Performance Tool W87030 One Man Automotive Hand Vacuum Pump Test & Brake Bleeder Kit One person brake bleeding and automotive test kit. Vacuum tool can test and diagnose a wide varity of parts and common systems on any vehicle. Complete kit includes accessories for both brake bleeding and automotive diagnosis. Test Ignition timing, chokes, mechanical fuel pumps, and other vacuum actuated accessories. Pumps approximately 1 cubic inch per stroke, and develops and holds up to 25" of vacuum (Mercury Hg) Vacuum gauge scales is in inches of Mercury (Hg) New design which can be identified with the gray handle. New design includes added features and improved structural design