Gear pump GR1/GR1 TANDEM compact - with german flange ACW Rotation - Capacity 1.0 cc / rev. + 1.0 cc / rev. - Maximum operating pressure 230 bar - Central body in aluminum - Aluminum Flange and Bottom - Forum Attack D = 8.5 mm - 40x40 = Int - centering diameter D = 32mm. Tree Pen D = 11x5 - Inlet Ports GAS-BSP 3/8 "outlet port G 3/8" G on side.