Pump produces vacuum or pressure at the turn of a switch. Comfortable ergonomic design. Pressure and vacuum are created on the squeeze stroke for superior accuracy and control. Includes durable, accurate gearless diaphragm style compound vacuum/pressure gauge. Field serviceable - service parts and kits available Dual converter pumps are capable of producing vacuum or pressure at the front port. A rotating knob on the side of the pump allows the operator to switch between vacuum and pressure. Max. Vacuum: 25 in Hg, 85 kPa. Max. Pressure: 30 psi / 207 kPa.