SPIN-ON FILTER 4 PORT MOUNTING HEAD WITH INTEGRAL PRIMER BULB PUMP Spin-On Filter Head has 4 - 3/8"-18 NPT ports (2 in, 2 out) Integral primer bulb with bleed screw Accommodates all 1"-14 threaded spin-on filter elements Fits Racor R45, R60, R90, and R120 models Compare to Racor RK22425