KV Heavy Duty Shelf Brackets. Holds up to 1000 lbs. per pair when mounted per manufacturer recommendations. 5mm thick steel bar construction. White epoxy coated finish. Recommended fasteners (not included) are 3" or longer x 5/16" lag screws mounted into studs. Attach shelf using a #8 or larger round-head wood screw. 13" H x 19.5" L.