... . Material: Brass/Zinc/Aluminum 3. Finish: PB/SN/CP 4. Double open or single open 5. OEM welcome Brass lock cylinder1.Material ... :Brass,stainless steel,Alloy,Zinc alloy,Aluminum.2.Lock cylinder length(mm):30,40,50 ... ..5.Finish:PB,GP,AC,AB,SN,NP,CP ect. high quality brass cylinder, profile cylinder, Euro profile cylinder, lock cylinder