Description: Resist oils, hydraulic fluid and water. Combined by rubber ring and metal ring. JB982-77 Standard Gasket Application: applicable to the oil pipeline system as a medium, for welding, card sets, expansion pipe joint sealing pressure system plug and mechanical device, to prevent oil, fuel, water and drug leakage Material: Rubber and metal Inside diameter: 22mm Outside diameter: 30mm Thickness: 2.5mm Package Includes: 100 x Gaskets Note: Please allow 1-3mm error due to manual measurement, make sure you do not mind before you bid. The colors may be different for the different display, please understand