hat
Ni plak zo rèldo: Ductile fèt an fè (Nikèl kouvri), GGG25/GGG20/GGG50/aliminyòm bwonz, en fe (, CF8, CF8M, CF3, CF3M
eng
Disc: Ductile iron (nickel coated), GGG25/GGG20/GGG50/aluminum bronze, stainless steel（CF8,CF8M,CF3,CF3M