【400x250mm Shelf Brackets】: 16 inch shelf brackets,including Mounting Hardware.they can support up to 30kg per pair and if you want to use them for heavier loads you can fit more brackets for floating shelves.These brackets are designed to support shelves from 16 inches to 18 inches deep. 【Wide Application】: The package includes 4 brackets, 8 expansion screws, 8 long standard screws, 8 short standard screws, 8 butterfly expansion tubes (screw included). Whether it is wood, plasterboard or concrete walls can be installed. (Note: planks not included.) 【Durable and High Quality】：Our shelf bracktets are made from premium steel, characterized by good impact resistance and no paint off. Widely used in a variety of rooms in a home, including the garage, kitchen, laundry room, backyard, and more. 【Rust-proof Coating】 Sturdy steel material with a black powder-coated finish is durable, chip- and corrosion-resistant. The smooth and rounded surface makes it easy to maintain. 【Quality Services】:We have high efficiency after-sales service. If you have any questions in the process of using, please feel free to contact us. Our team will help you solve the issues ASAP, Manufacturer: Joumoswk