1.Size (mm):60,70,80,etc 2.Materials:brass,etc 3.Key way:S or E way 4.Finish:NP,NB,SN,BP,etc 5.Used:bedroom,public area, cylinder type surface treatmentCodeProductCodeProductSCsingle cylinderNBnickel brushDCdouble cylinderNPnickel platedBCbathroom cylinderBPbrass polishingHChalf cylinderPCpure copperHHhalf handle cylinderSNsatin nickelDBdouble bias cylinderCPchrome plated SBsingle bias ...