... stainless steel,Alloy,Zinc alloy,Aluminum.2.Lock cylinder length(mm):30,40,50,60,70,80 ... ,ect.3.Keyway:E-computer key,S-normal key.4.Used in general lockset, say residents ... , public area..5.Finish:PB,GP,AC,AB,SN,NP,CP ect. high quality brass cylinder ... , profile cylinder, Euro profile cylinder, lock cylinder