Heavy Duty Panel Cart. Not only is it the perfect panel cart for transporting plywood, drywall, paneling, doors, etc.; it transforms into a platform truck when you remove the 27" high support rails. This cart is powder coated blue and features a side retainer lip that keeps cargo on the deck. Two rigid and two swivel 5" x 2" poly-on-steel casters included. Ships knockdown, assembly required. Specs: deck size 29 1/2"x36"; capacity 4,000 lbs.