Select a Product Part NumberIncludesUsed on BA31-300RK1Buna O-ring3" Aluminum Adapters, 3" Bronze Adapters BA31-200RK1Buna O-ring2" Stainless Steel Adapters BA32-300RK1FKM O-ring3" Aluminum Adapters, 3" Bronze Adapters BA32-200RK1FKM O-ring2" Stainless Steel Adapters