Disc

Bronze
CF8M Stainless Steel
Ductile Iron ASTM 395 (Nickel Plated)
Ductile Iron ASTM A395 with EPDM or BUNA-N Encapsulation
Ductile Iron ASTM A536 with EPDM Encapsulation
Heat-treated steel
Iron
Stainless Steel ASTM A351 Grade CF8M