... .Material:Brass,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 ... ,GP,AC,AB,SN,NP,CP ect. high quality brass cylinder, profile cylinder, Euro profile cylinder, lock cylinder