One of the best van rack systems on the market today, the Cross Tread Industries 600 Series van rack is sure to meet your demands. Featuring Cross Tread's patented universal gutter clamping mechanism. The 600 series has 4" wide uprights made form 3/16" thick diamond tread plate steel with 1 1/2" by 1 1/4" 14 gauge steel tubing. The cross members are adjustable from 41" to 72" wide with a high gloss powder coat finish (black or white). When the load is evenly distributed this unit has a weight rating of 600 pounds. Add a third "middle" bar for even more capacity.