ANSUL Foam Hardware ( Line Proportioner, Brass, PL-480 (480 gpm), 3% Conc. Orifice ) Part Number : 71518 Material : Line Proportioner, Brass, PL-480 (480 gpm), 3% Conc. Orifice Thread Size/Type: ………….. Weight (lbs): 30 Part Description: …………..