Prevents scratches from metal on metal ware. Extra wide and extra tall to absorb shock. Can be used to prevent scratches on surf boards, sheet rock, canvases, and other more delicate items. (Tie-down are not included) Compatibility: - A285 (J-Series Extruded Aluminum Cross Bar) - A286 (P3000, H3 & J-Series Extruded Aluminum Cross Bar) - A333 (H1 Extruded Aluminum Cross Bar ) - A613 (H1 Extruded Aluminum Cross Bar) - Also fits other channels with 3/8" Openings.