This kit inlcudes the premiere Silverline™ Dual Converter™ Pump, producing vacuum or pressure at the flip of a switch. With its compound gauge, vacuum and pressure can easily be read without having to change tubing or ports. This is a "must have" tool for the serious mechanic. The kit also includes brake bleeding and automotive test accessories, the Mityfill™ Automatic Fluid Feeder, vacuum plugs, tubing, and our 110+ User's Manual organized in a durable plastic case.