1. Stainless steel 304/316 materail 2. End port & Victaulic clamp closure A. Material:Stainless Steel #304/#316LB. Housing tube type: SeamlessC. End cap material:ABS,Stainless steelD. Max.working pressure:300psiE. Inlet port:1 1/2″VictaulicF. Outlet port:1″female threadG. Model:8040,8080,80120,80160… Stainless Steel RO Membrane Vessel