Shelf brackets for shelf track or dual slot standards 23/4 inches base height depth 12 inches, White, Heavy Duty Shelf Track Bracket, Proprietary Notch Free Bracket Makes Shelf Installation Easy, Works With All Ventilated Shelving, Protects Shelf Vinyl Coating, Locks Shelving In Place, Exclusive Locking Tab Prevents Injury and Property Damage, Shelf Cannot Be Pushed Up and Unlocked. For use with Shelf Track system. Locks the wire shelf to the vertical wall standard for added safety. Keeps shelves from being pushed up and unlocked accidentally. Works with ventilated shelving. 1/2 inch width.