Product Information: This pergola kit includes 4 packs pergola brackets. Actual inner size:5.5x5.5inch,This size applies to nominal standard 6""x 6"" wooden post (actual 5.5""x 5.5"" post on market) there is a slight error in the actual size, usually the error is about 1mmEach angle of corner connector is 90 degrees. Simply cut the wood to your desired length and assemble. Quality Materials: The pergola kit steel brackets are made of thickened plate steel structural with black powder coating, making them rust-proof and sturdy. This effectively extends the service life of the pergola brackets, ensuring they are breakage-proof and deformation-proof. You can build a stable pergola for family gatherings with these premium material pergola accessories. Additionally, they do not corrode or peel easily in bad weather conditions, so there s no need to worry about. Wide Application: The pergola brackets are commonly used in various places such as balconies, courtyards, parks.