Excellent material: Our O-rings are made from nice advertisement grade nitrile rubber (NBR, Buna-N), with good water resistance, oil resistance, heat resistance, sealing, corrosion resistance, abrasion resistance, and antistatic homes , To meet the needs of safe and durable use.Variety of Models: Universal O Ring buna kits, mechanic nitrile repairs, foremost for all workshops and onsite carrier engineers. Our products have 24 varied models to meet your different needs, Sizes fluctuate from 6mm to 28mm in outer diameter. For more details, please talk over with our size pictures.Wide Applications: Our products have preferrred heat resistance: -40°C (-40°F) to 120°C (248°F) and are strong and ductile. Therefore NBR O-rings can prevent leakage in gas or water pipes, hydraulic and pneumatic connections, and supply a safe seal for any oil, air, gas and water sealing applications (faucets, sinks, filters); utilized in electronic equipment , Pipes, faucets, pumps, solenoids, stress gauges, sensors, autos, motorcycles, ships, engines, spray guns, etc.Convenient Storage and Use: 740 pieces of NBR rubber O-rings are saved in a sturdy, clear plastic field with a label, and the required size would be smoothly selected, disposing of the hassle of sorting and selecting the size. Abundant types and adequate quantities can enable you to use enough time.Quality Assurance: Customer satisfaction is our pursuit. We have full self assurance in our products. If you aren't convinced for any purpose within 30 days, please go back your instrument equipment without any questions. We additionally provide 7*24 visitor service.The specifications of this product are:Nitrile O-ring 505mm (black)Black nitrile rubber O-ring 6.5 * 1.5mm (50pcs)Black nitrile rubber O-ring 7 * 1.5mm (50pcs)Black nitrile rubber O-ring eight * 1.5mm (50pcs)Black nitrile rubber O-ring 9 * 1.5mm (50pcs)Black nitrile rubber O-ring 10 * 1.5mm (50pcs)Black nitrile rubber O-ring eleven * 1.5mm (50pcs)Black nitrile rubber O-ring 12 * 1.5mm (50pcs)Black nitrile rubber O-ring 13 * 1.5mm (50pcs)Black nitrile rubber O-ring 14 * 1.5mm (30pcs)Black nitrile rubber O-ring 15 * 1.5mm (30pcs)Black nitrile rubber O-ring 16 * 1.5mm (30pcs)Black nitrile rubber O-ring 17 * 2.4mm (20pcs)Black nitrile rubber O-ring 18 * 2.4mm (20pcs)Black nitrile rubber O-ring 19 * 2.4mm (20pcs)Black nitrile rubber O-ring 20 * 2.4mm (20pcs)Black nitrile rubber O-ring 21 * 2.4mm (20pcs)Black nitrile rubber O-ring 22 * 2.4mm (20pcs)Black nitrile rubber O-ring 23 * 2.4mm (20pcs)Black nitrile rubber O-ring 24 * 2.4mm (20pcs)Black nitrile rubber O-ring 25 * 3.1mm (10pcs)Black nitrile rubber O-ring 26 * 3.1mm (10pcs)Black nitrile rubber O-ring 27 * 3.1mm (10pcs)Black nitrile rubber O-ring 28 * 3.1mm (10pcs)