Vantech H1 3 Bar Low Profile ladder roof rack, Low Top, 07-On Sprinter A500 crossbars are made from 14-gauge steel, 2" X 1"rectangular bar. Max Load capacity of 250 lbs. per bar Galvanized mounting base and accessories for additional protection against rusting Installed onto roof of vehicle through tracks without need for 45 degree adaptor Steel Mounting bases are 10 gauge steel with 8in wide base. Total height of 10.25in Requires Sprinter roof tracks for install. Vantech part number R20, R21