The sliding sleeve and set screw can make by carbon steel,aluminum,brass etc.We can make all produce ... sleeve with high quality and reasonable price.1) Hose screw sleeve,engine sleeve,sliding sleeve,straight thread sleeve,ferrule ... ect,2) Material:Zinc ally,Penter,Aluminum,Stainless steel,Iron,Brass,Plastic ect.3) Color Pantne color chart ... on base of your drawings. Sliding sleeve and set screw