... steel, carbonsteel aluminum, bronze, 304L, 316L, and other alloy.carbon seep aluminium, strengthen polypropylene, strengthen nylon6, strengthen nylon 66 ... steel, carbonsteel aluminum, bronze, 304L, 316L, and other alloy.carbon seep aluminium, strengthen polypropylene, strengthen nylon6, strengthen nylon 66 ... Ceramic pall ring With Excellent Anti-Acid High-Temperature Endurance Performance