ANSUL Foam Hardware ( Line Proportioner, Brass, PL-660 (660 gpm), 3% Conc. Orifice ) Part Number : 71548 Material : Line Proportioner, Brass, PL-660 (660 gpm), 3% Conc. Orifice Thread Size/Type: ………….. Weight (lbs): 40 Part Description: …………..