We are offering rubber o-ring that is the rubber component of most of the pump seals. Rubber o-ring is used for controlling temperature, pressure and chemical limits of the mechanical shelf. These rubber o-rings are similar in shape and are available in black color. They are offered in dimension 2.0 mm id to 600 mm id. materials used : nitrile butadiene rubber neoprenebutyl poly-acrylic epdmhapa lonviton silicone rubber features : accurate dimensions glossy finish invisible flash line properly post cured absolutely defect free