S Style Shower Arm, Satin Nickel Finish, with Flanges, Raise up 4" - By Plumb USA Brass Construction, Satin Nickel Finish Behind-wall length allowed: 2.50 inch 8"-length straight end to end. Raise showerhead up about 4" from wall outlet. reach out 8" Shower Arm Flange Included 1/2" Male Threaded Connection