Silicone gasket ring seal for wooden lid 1.Material: Silicone 40shore A 2.Color:white & Transparent ... , NR, SBR, EPDM, CR, Silicon, FKM, Neoprene, etc.4. All food grade silicone production process confirmed by ISO9001, and ROHS approve5 ... -proof.7Used for compressor, air conditioner, machinery, electric appliance, dry food containers etc.