Features: 1Carbon Steel: These black shelf brackets is made from premium carbon steel material which is sturdy and durable. 2Unique Design: These black shelf brackets features protrusion design that could make your shelf more firm and stable. 3Wide Application: These black shelf brackets are widely used in kitchen bathroom bedroom office and so on. 4Thickened Size: These black shelf brackets have been thickened and widened which ensures high reliability. 5Easy Assembly: You will receive 4 pieces black shelf brackets with 16 screws and 8 expansion tubes more convenience for assembly. Specification: Item Type: Shelf BracketMaterial: Carbon Steel Scope of Application: Study Balcony Bedroom Bathroom Living RoomProduct Size: Approx. 184 x 133 x 40 x 25 x 6mm / 7.25 x 5.23 x 1.57 x 0.98 x 0.23in ( Manual Measurement Slight Error May Exist )Weight: Approx. 2570g / 90.65oz Package List: 4 xShelf Bracket8 x Expansion Tube16 x Screws