Material: Nitrile rubber (NBR), antistatic, oil resistance, UV resistance, heat resistance, wear resistance, durability and long service life.Quantity and size: 270 pieces 18 popular sizes O-ring gasket.Application: O-rings are widely used in automobiles, faucets, hydraulics and pneumatics, key seals, industrial equipment and electrical appliances.Features: easy to install, good scalability, easy to use.Storage: The transparent plastic box has 18 interlayers, O-rings can be arranged according to the purpose, and a size chart is attached to facilitate the distinction of different sizes.colour: purpleMaterial: nitrile rubberPackage Contents:270 x rubber O-ringOnly 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.