"A third crossrail should be added to Item# 330932 for short loads or when extra support is needed (up to 650 lbs.). Lightweight aluminum rack has 6in.-wide side plates and mounts to van rain gutters with drill-free installation. Please have year, make and model of vehicle ready when ordering. U.S.A. Drill-free installation Includes 1 crossrail Adjustable tie-down loop on crossrail helps secure cargo Extra-thick white powder-coat crossrails Includes galvanized mounting hardware and instructions"
