... a gauge protector or 1:1 piston separator, a high-pressure hose and hand pump.Features:Standard capacities included: 7MPa, 14MPa, 21MPa ... system consists of a 6-inch pressure gauge, a gauge protector, and a high-pressure Hose. Features:Standard capacities include: 4,000 ... psi, 8,000PSI, 12,000PSI and 16, 000PSI ...