Features and Benefits:•A rugged, lightweight steel cart with wheels and convenient storage pocket for scale and hoses allows this portable charging station to be taken almost anywhere.•240 lb capacity scale with long lasting 9V battery (60 hrs).•Deep micron, rotary vane vacuum pumps. °Extruded aluminum manifold with long lasting valve designA lightweight, durable, steel frame cart that contains all the necessary tools to quickly and conveniently charge the A/C system. No need for different sized charging cylinders with Mastercool’s rugged die cast electronic scale. Simply place the refrigerant cylinder on the scale and charge.