Do not use thread sealant or P.T.F.E. tape on Shower WallNut end of shower arm|Stub out to shower arm connection is made outside the finished wall ensuring there are no hidden leaks behind the finished wall|Stub out with copper tube just like other fixtures|Shower arm installation tool allows for easier install with no external damage|No hidden leaks behind the wall that promote mold growth|No pipe seal tape or pipe joint compound needed on shower arm threads|301 stainless steel lock ring|Plated brass escutcheon|40 percent glass filled nylon