Product Description: 1.Material : Galvanized Solid steel. Will not get rust or bend.This floating brackets included 6pcs 2.Advantage:Strong enough to hold your shelf steadily. Can be used in area with limited space, or hang a invisible shelf on wall. With premium finish and durability, this shelf brackets have better performance and it perfect to be your floating shelves helper 3.Kindly Note:We recommend mounting to a stud on your wall for maximum support. Each bracket holds 15lbs. For heavier shelves please add extra brackets to distribute the weight 4.Scope of use:Use a router to remove 42mm from wood. Made to completely hide behind your shelving, small profile for easy concealing Specification:Material: Iron.Size: 70mm (L) x 75mm (W) x 14mm (H); Mount Hole Distance: 42mmColor: Silver.Package Includes:6*Concealed Shelf Suppor Note: .1. Due to manual measurement, please allow a small error. Please make sure you don't mind before bidding 2. Colors may vary depending on the display. Please understand Note: Hello, please pay attention to your shipping address when purchasing products. If your receipt information (such as name, street, house number, doorbell/email without name, etc.) is incorrect, the order will not be delivered correctly