The New Haven “Chicago Style” Slip-Pruf® 4 Wheel Dolly is like no other. It is patterned after the original Slip-Pruf® Dolly, with the frame ends mortised, countersunk and bolted to keep the Slip-Pruf® frame true. All frame corners are rounded under the rubber bumper to provide extra air-cushion corners. Side rails are kiln dried hardwood. The Slip-Pruf® rubber cap is securely fastened to the head rails for holding power. Frame size is 18”x32", with casters inset 4 inches, allowing the dollies to be stacked inline, making corporate moves one step easier, available with 3.5”, 4” & 5” casters.