ANSUL Foam Hardware ( Line Proportioner, Brass, PL-600 (600 gpm), 3% Conc. Orifice ) Part Number : 71538 Material : Line Proportioner, Brass, PL-600 (600 gpm), 3% Conc. Orifice Thread Size/Type: ………….. Weight (lbs): 40 Part Description: …………..