[High-quality material] It is made of high-quality commercial grade material, which has good water and oil resistance, good heat resistance, good sealing, corrosion resistance, abrasion resistance, and antistatic. strong and sturdy. Heat resistance: -40Celsius (-40Fahrenheit) to 120Celsius (250Fahrenheit)[Product features] The soft and elastic O-ring, only needs to be fastened, and it is easy to install. A set of high-quality O-ring seal hooks is included as a gift --- O-rings and various seals can be easily removed. Two hooks can be installed at both ends of the aluminum alloy rod to meet your different needs.[Popular sizes] 24 popular sizes O-ring gaskets. You may not know what size you need. Fortunately, all sizes of this O-ring set are sufficient to meet various family needs. Metric sizes range from 6 mm to 28 mm in outer diameter, and 3 reasonable thicknesses are provided according to different sizes: 1.5 mm / 2.4 mm / 3.1 mm.[Convenient storage] 1200 NBR rubber O-rings are stored in a sturdy transparent plastic box with a label, which saves you the effort of sorting and size selection. 1200 pieces are enough for you to last for months or even years. You don't need to go to the hardware store.[Widely used] Metric O-rings can prevent leakage of fuel or water pipes, mechanical, hydraulic and pneumatic connections; provide a safe seal for any oil, air and water sealing applications (faucets, sinks, filters). Used in electronic equipment, pipes, faucets, pumps, solenoids, meters, sensors, trucks, automobiles, motorcycles, boats, engines, spray guns, high-pressure washers, etc.colour:BlackMaterial:Nitrile rubberPackage Contents:1200 x O Rings1 x O-ring sealing hooksOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.