MPS / Mobile Power Source built double sided or single sided for AGW, EGW, AVW, and VUP automatic tank welders. Available with our without a built in spill containment drip pan incase there is a fuel or oil spill from the Lincoln or Miller MPS. The frames are built to order to fit your MPS. A.K.A. Tow Behind Power Skids that can be attached directly to a (AGW) Automatic Girth Welder (3 O’clock welder), (EGW) Electrogas Welder, (AVW) Automatic Vert Welder, (VUP) Vertical Up Welder or Automatic Girth Welder to reduce cable length and wind-up problems. This design can be built for almost any (MPS) mobile power source. The rotary grounds are attached to wheel axles to provide constant ground current conduction.