The hose screw sleeve can make by carbon steel,aluminum,brass etc.We ... high quality and reasonable price.1) Hose screw sleeve,engine sleeve,sliding sleeve,straight thread sleeve,ferrule ect,2) Material:Zinc ally,Penter, ... ) Track the process, with 6 working days every week, and CNC, EDM 24 hours working everyday. So we can guarantee the ... of productions on base of your drawings Hose screw sleeve