Trident 101 series 316SS tube frame test unit, 8 litre 316SS tank w/ lid & sight level, fitted with SC Hydraulic air driven pump, D5000B195, and 0-20,000 psi pressure gauge. Pump Specifications; - 195:1 ratio, 18,750 psi MWP - 0.138 cu in displacement per stroke Test unit outlet connection 3/8 inch MP female.