This reliable, rotary vane type, low cost, two stage, high vacuum pumps operate quietly and features a clean, functional design with vibrationless operation. Specifications: Free Air Displacement: 85 liters per minute (3 cubic Feet per Minute). Ultimate Vacuum: 1-micron laboratory conditions/better than 25 microns field conditions. Pump Speed:1725 RPM. Motor: 1/2 HP 110V, 60Hz.. Oil Capacity: 27oz. (785cc).Operating Temperature: 30º F to 170ºF. Intake Port: 3/8″ OD for 3/8″ ID. Tubing. Weight: 30mlbs. Dimensions: 15.5L x 6.5W x 11.25 in.H (38.8 x 16.3 x 28.1cm).