Adjustable Elevated Post Base Material:Alloy Steel Brand: Color:Color zinc Material: Iron, electro-galvanized. Adjustable height: 3.5 inches to 5.7 inches can be adjusted at any time. Helps to install floors and decks easily and quickly. Bearing capacity: A single bracket can bear 4400LB. Suitable for: Canopy Columns, Pergola, Terrace, Balcony, Floor Support. If you have any problem during use, please send me an email, we will reply and give you a satisfactory solution. "