Commercial platform trailers, namely, high flat trailers, step deck trailers and double drop trailers; extendable deck trailers, namely, high flat extendable trailers, step deck extendable trailers and double drop extendable trailers; detachable commercial and construction gooseneck trailers, namely, hydraulic detachable gooseneck trailers and mechanical detachable gooseneck trailers; general use equipment trailers, namely, hydraulic tail trailers, sliding axle rigid gooseneck trailers and folding gooseneck trailers; multi-axle dollies, namely, steering dollies; air, mechanical and hydraulic boosters, namely, axle bearings for trailers and axle boot kits for use with trailers; pneumatic and vacuum enabled aluminum dry bulk type trailers; material hauling trailers, namely, aluminum and steel end dump and bottom dump material hauling trailers