4PCS 345 Folding Shelf Support Bracket Hidden Floating Wall Shelf Support Brackets for Heavy Duty Bracket T Shape Screw Specification: new Material: Cold Rolled Steel Color: Silver Size: 3'', 4'', 5'' For 20-30mm shelf thickness For installation directly into wood work or masonty For the concealed mounting of shelves(no visible support) Height adjustable via slots against wall Angle adjustment via supporting pin which presses on the rear plate when turned in Package Included: 10 x Concealed Floating Shelf Support Brackets and 20pcs screws Note: Please allow minor error due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. _x000D_