ITEM NAME:50mm x 5mm Nitrile Rubber O Ring NBR Oil Sealing Gasket 10 Pcs T2T5 50mm x 5mm Nitrile Rubber O Ring NBR Oil Sealing Gasket 10 Pcs T2T5 Product Name : O Ring;Material : Nitrile Rubber(NBR) Outside Diameter : 50mm / 1.97";Inner Diameter : 40mm / 1.57" Thickness : 5mm/ 0.197";Color : Black Weight : 35g Package Content : 10 x O Ring Features high and low temperature resistance, UV-resistance, Ozone resistance, abrasion resistance. Applications: automobile, electrical appliance, mechanical, industrial, construction, household, and other fields. 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..Features high and low temperature resistance, UV-resistance, Ozone resistance, abrasion resistance. Thickness : 5mm/ 0.197";Color : Black.