ITEM NAME:10 Pcs Black Rubber Oil Seal O Ring Gasket Washers 40mm x 37mm x 1.5mm Y6J5 10 Pcs Black Rubber Oil Seal O Ring Gasket Washers 40mm x 37mm x 1.5mm Y6J5 Product Name : O Ring;Material : Rubber Color : Black;Inside Diameter : 37 mm / 1.46" Outside Diameter : 40 mm / 1.57";Thickness : 1.5 mm / 0.06" Weight : 4g 10 pcs black rubber oil sealing O rings, high quality material, oil resistance, abrasion resistance and water proof. O-rings are donut-shaped rings used in industry to seal off or prevent leakage of fluid or gas in an application. Suitable for both static and dynamic sealing. Package Content : 10 Pcs x O Rings 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..10 pcs black rubber oil sealing O rings, high quality material, oil resistance, abrasion resistance and water proof. O-rings are donut-shaped rings used in industry to seal off or prevent leakage of fluid or gas in an application.