Express Custom Trailers, custom builds All Aluminum Dump Trailer. We start off with the 5x10 5200GVW. and go up to 6x12 10,000GVW Standard sides are 18" of aluminum and 6" of Crush board. (2x6) we can go up to 36" of aluminum and 12" of Crush boards. All aluminum 3/16" floor. Add a tarp kit $690.00 Spare Tire & Mount Starting @ $250.00 Two Year Warranty on any Express manufactured parts