Want a maintenance free alternative to steel? Try the 400 Series van racks for years of rust free service. These aluminum van racks come with Cross Tread's patented universal gutter mount clamping mechanism. Featuring 4" wide uprights made form 3/16" thick diamond tread plate aluminum with 1 1/2" x 2" cross rails made from extruded aluminum tubing. This van rack adjusts from 41" to 72" wide and has a 400 pound weight capacity when load is evenly distributed. Add an additional "middle" bar to your order for even more capacity.