Nice assortment of sizes.

Good assortment of O-rings. They work well for regular O-rings too. They are stiff and feel like they will last better than the soft O-rings. A decent price for180 O-rings.

These are much stiffer o-rings (90 durometer) than you typically see. They don't tear as easily and are very durable. These are specific for ORFS fittings but will also work in many other applications. These thickness of these is roughly 1.75mm.

This O-ring kit is a lifesaver for my hydraulic fittings. The Buna 90 material is durable and works perfectly for various applications. With 180 pieces, I have all the sizes I need for any project, and the kit is well-organized for easy access.Pros:The variety of sizes ensures you’re covered for any hydraulic fitting job.The Buna 90 material offers great durability and resistance to wear.Cons:The kit may include a few sizes that aren’t commonly used, leading to some waste.It could be more compact for easier storage in a toolbox.

These o-rings seem to be well made and feel fairly hard and tough (expected for hydraulics). I don't see any notable mold flash or lines on them. The case is decent, although all the o-rings were mixed up from shaking around in transit, so it's not the best at keeping them separated. Overall, decent for the money.

These O-rings are almost to the point of being stiff. They are not the type of O-ring that you find in flashlights or other small electronics. Now, they will work for that exact purpose, but I would imagine they are a wee bit on the side of overkill.The case is okay but you will find that you have to go through and reorganize it because the dividers are not fixed and will move allowing the smaller O-rings to mix in with the larger sizes.

This is a good value for a good quality set with a nice quantity of 180 flat style hydraulic o-rings in a nice variety of 8 different sizes.The size range is 04 (¼”) (smallest) to 24 (1 1/2”) (largest). You get between 10 and 30 o-rings in each size. The smallest size has 30, the 5 smallest after that have 25 each, the next to largest size 15 and largest size has 10 o-rings. There are a lot more small o-rings in the set quantity wise than larger ones. If you look closely at the listing details and pictures you can see how many of each size are included.The quality is nice and they are sturdy and well made. They do have some elasticity to them and a hardness rating of 90 durometer. They are rated for use in temperatures between -40 C (-40 F) up to 100 C (212 F). They’re rated as resistant to both wear and abrasion. They’re constructed of buna nitrile material.It comes in a nice, clear, hard plastic, sectioned case that has a size chart printed on it. The case opens and closes easily and securely. However, I would have given the set 5 vs 4 stars had there not been an issue with the o-rings scattering everywhere between compartments by the time you get them. The o-rings and case overall are 5 star, but the case sections inside aren’t tall enough to keep the o-rings from moving one section to the other.By the time you get it, or if you store or carry the case sideways (like a book on a shelf) vs laying flat, the o-rings move from one compartment to another. If you don’t mind pouring them out (I used a tray so I wouldn’t loose any) and resorting them (took about 5 minutes to do so) when you get them and don’t store them any way but flat (lay the case flat during storage), it’s not an issue.Had the compartment separators been taller or something added in the case to prevent this it would have been nice. It wasn’t just a few that were not in the right compartment, they were completely mixed up and more weren’t than were in the right compartment when I got it. It’s not a big deal, if you don’t mind spending 5 minutes after you get them to sort it. If you do need to carry or store it sideways vs flat, it could be frustrating to have to resort.Be sure and check the listing details and pictures for the sizes included in greater detail. Be sure they are the right size, shape and style for your use.Note that the case compartments aren’t going to be completely full. You get the number as shown in the listing details and pictures of each size. But it is going to be noticeable (as it is in the pictures) that it’s an under-filled case. They give you the amount shown, it’s just not a case that looks full when you open it. You could easily add several (2-3) of these sets together in one case and still have room in the case.

Review of ANCIMOON Flat Face O-Ring Kit for ORFS Hydraulic Fittings, Buna 90, 180PCSKey Features:Comprehensive Kit:The ANCIMOON Flat Face O-Ring Kit includes 180 pieces of Buna 90 O-rings, offering a broad selection of sizes. This makes it an excellent choice for a wide range of hydraulic fittings, particularly for ORFS (O-Ring Face Seal) connections. The variety of sizes ensures compatibility with different applications, reducing the need for multiple individual O-ring purchases.Durable Buna 90 Material:The O-rings are made from Buna-N (Nitrile) 90, which is known for its high resistance to oils, fuels, and hydraulic fluids. This material is commonly used in hydraulic applications due to its excellent sealing properties and resistance to wear and tear, making it ideal for high-pressure systems and heavy-duty environments.Flat Face Design:Designed for ORFS hydraulic fittings, the flat face O-ring shape provides a reliable, leak-proof seal when paired with compatible fittings. This design is commonly used in high-pressure and heavy-duty applications, ensuring a secure and tight connection.Wide Compatibility:This kit is specifically designed to fit ORFS (O-Ring Face Seal) fittings, which are commonly used in hydraulic systems. If you're working with hydraulic machinery, industrial equipment, or automotive repairs that require hydraulic seals, this kit offers excellent compatibility.High-Quality Performance:The Buna 90 O-rings are engineered to perform well under pressure, providing reliable sealing performance in high-pressure systems. They are also resistant to temperature fluctuations, making them durable in various operating environments, including extreme temperatures.Convenient Storage Case:The O-rings come neatly organized in a durable plastic storage case that helps keep the pieces easily accessible and prevents them from getting lost or mixed up. This organization makes it easier for users to find the right size quickly when working on different hydraulic fittings.Great for DIY and Professional Use:Whether you're a DIY enthusiast working on your own hydraulic systems or a professional mechanic or technician, this kit provides the necessary parts for repairing or maintaining a wide variety of hydraulic systems, making it a versatile tool for a range of projects.Pros:Variety of Sizes: The 180-piece assortment provides a wide range of O-rings to suit different hydraulic fittings, making it easy to find the right fit for each job.High-Quality Material: The Buna 90 rubber is durable and resistant to oils, fuels, and hydraulic fluids, ensuring long-lasting, effective seals.Reliable Performance: The flat face O-ring design offers a strong, leak-proof seal, particularly in high-pressure hydraulic systems.Great Storage Case: The organized storage case keeps the O-rings neatly arranged, allowing for quick and easy access when needed.Wide Compatibility: The kit is perfect for those working with ORFS hydraulic fittings, providing compatibility for a range of applications from machinery to automotive systems.Cons:Limited to ORFS Fittings: While the kit is perfect for ORFS hydraulic fittings, it won't be suitable for other types of fittings like BSP, NPT, or JIC, so users with other types of systems may need different O-ring kits.Buna 90 Limitations: Although Buna 90 is highly durable and versatile, it may not be suitable for use in applications where extreme temperature ranges or exposure to harsh chemicals is present. For such conditions, materials like Viton may be more appropriate.Best Uses:Hydraulic System Repairs: Ideal for those who need to replace or maintain ORFS hydraulic fittings, especially in industrial, automotive, or heavy-duty machinery systems.Automotive Applications: Perfect for hydraulic systems in vehicles such as tractors, trucks, and construction equipment.DIY and Professional Mechanics: Suitable for both DIY repairs and professional use in industries that require reliable hydraulic connections and seals.Final Thoughts:The ANCIMOON Flat Face O-Ring Kit for ORFS hydraulic fittings is a practical and reliable solution for anyone working with hydraulic systems that require O-ring face seals. With 180 pieces of Buna 90 O-rings in various sizes, this kit provides excellent coverage for a wide range of hydraulic repairs and maintenance.The Buna 90 material ensures long-lasting performance, with strong resistance to oils, fuels, and hydraulic fluids, making it ideal for demanding applications. Additionally, the flat face O-ring design ensures a tight, leak-proof seal, providing peace of mind in high-pressure environments.The kit is organized neatly in a plastic storage case, which makes it easy to find the right O-ring quickly, whether you're working on a car, truck, or industrial machinery. However, this kit is best suited for ORFS fittings and may not be compatible with other types of fittings, so it's important to verify your specific needs before purchase.Overall, for those working with hydraulic systems, the ANCIMOON Flat Face O-Ring Kit is a cost-effective, high-quality, and well-organized option to meet the needs of most hydraulic repairs.