The PowerCart 300 is carefully designed to fit current large frame units with the Power Cool 400 water coolers. These units include the PowerTIG 315LX, PowerTIG 350EXT, PowerMTS 252STi, and LightningMTS 275. This cart is designed to be sturdy and firmly hold the nested units together. It's low profile keeps things compact and and improves center of gravity. It's large wheel design easily rolls around most items in the shop. Defects, dirt and other small items in and on the shop floor are easily rolled over if needed thanks to the heavy duty wheel carriage. It will hold up to one large gas cylinder securely in place. This design is specially made for the Everlast large frame units and the top carry handle on the unit is removed to accept the capture bar on top. It is not designed to fit smaller units. This cart will hold one gas cylinder.