Seachoice Marine Dock Cart item 78541. Durable plastic bin that holds over 5 cubic feet. Low Maintenance - flat free 20" tires with plastic weels for stability and long life. Heavy duty - additional axle brackets, full welds on frame and brackets and robust wheels and cotter pins. Assembles in seven easy steps. Versatile - move towels and gear to your boat, down to the beach, gear to a sporting event, hauling mulch around your yard and so much more.