Fiberglass reinforced polypropylene with EPDM O-ring seal and a stainless steel spring clip. Good to 100 psi at 175°F. Drill a 9/16" hole and attach to pipe. No threading or nipples required, grips the pipe and the body fits in the 9/16" hole. Spray is fan-shaped with spray angle of 65° at 40 psi and spray density tapers off toward the outside to permit overlapping of spray patterns. Swivel ball allows for 52° total angle of adjustment