Features: 1. Perfect to use to prevent leaks while working with plumbing, hydraulics, air and gas connections. 2. Rubber construction resists oil, gas, water, and alcohol solvents.Nitrile rubber(NBR), Heat and abrasion resistant. 3. Excellent oil and UV resistance:Commercial grade Nitrile Butadiene Rubber (NBR) 4. A variety of different sizes for personal and professional workshops, garage and plumbing services. Specifications: Material: rubber Packing size: 22*11.2*3cm/8.66*4.41*1.18' Weight: about 170g Notes: Please allow 1-3mm differs due to manual measurement. Due to the different display and different light, the picture may not show the actual color of the item. Thanks for your understanding. 1box X Sealing O-Rings Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!