... , 304L, 316L, and other alloy.carbon seep aluminium, strengthen polypropylene, strengthen nylon6, strengthen nylon 66, strengthen PBT. can also be requested by userb. Character It ... , 304L, 316L, and other alloy.carbon seep aluminium, strengthen polypropylene, strengthen nylon6, strengthen nylon 66, strengthen PBT. can also berequested by userb. Character It has ...