... 1xID50x1.45mmThickness Flat silicone ring gasket for ceramic pots with one air hole1.Material: 100% silicon material, soft and stretchy ... SBR, EPDM, CR, Silicon, FKM, Neoprene, etc.4. All food grade silicone production process confirmed by ISO9001, and ROHS approve5 ... for compressor, air conditioner, machinery, electric appliance, dry food containers etc.8. Different sizes are available for options.