Want a maintenance free alternative to steel? Try the 660 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 5" wide uprights made form 3/16" thick diamond tread plate aluminum with 1 1/2" x 2" formed Diamond tread plate tubing. This van rack adjusts from 60" to 66" wide and comes complete with ladder positioners. This unit has a 660 pound weight capacity when load is evenly distributed. Add an additional "middle" bar to your order for even more capacity.