... anti-acid,anti-alkali 3)high and low temperature resistance Foam rubber o-ring/Flat o-ring we are ... ,SBR,IIR,VITON.ect 2.good waterproof,abrasion-resistance,anti-oil,anti-acid and anti-alkali,high ... and low temperature resistance,ect,so it has long life and strong ... functions 3.excellent resistance to ozon,oxygen,mineral,oil,synthetic hydraulic fluid, ...