ITEM NAME:190 mm ODD 2.5 mm Thickness Red Silicone O Ring Oil Seal ring I3S7 190 mm ODD 2.5 mm Thickness Red Silicone O Ring Oil Seal ring I3S7 Product Name: O Ring Material: silicone Outer diameter: 190 mm Inner diameter: 185 mm Thickness: 2.5 mm Color: red Weight: 5 g Package contents: 1 x silicone O ring Only 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.