ITEM NAME:10 pcs O-ring made of nitrile rubber, outside diameter 80 mm, thickness 3.5 K3V4 10 pcs O-ring made of nitrile rubber, outside diameter 80 mm, thickness 3.5 K3V4 Seal ring made of rubber, round cross-section, easy assembly. Application: automotive, electrical devices, mechanical, industrial, construction, household, other areas. product name: sealing ring material: rubber outer diameter: 80 mm / 3.15 inches Inside diameter: 73 mm / 2.87 inch thickness: 3.5 mm / 0.14 inch color: Black weight: 32 g Package Included: 10 x sealing 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 +/- 1-3 cm..Seal ring made of rubber, round cross-section, easy assembly. material: rubber.