yale Cylinder, lock cylinder Comply with internation standard. ISO9001 certification. matarial: brass or zinc alloy. yale Cylinder, lock cylinder 1. Comply with internation standard.2. matarial: brass or zinc alloy.3. cylinder:5 pin or 6 pin tumbler.4. key systerm: Schlage, Weiser, Kwikset, Yale keyway available.5. Adams rite, baldwin or other cam are available.