Create a structurally sound frame with these 90-degree angle flat roof fittings from Canopies and Tarps. These fittings can be used in conjunction with poles to assemble a canopy structure. Each one is made from galvanized steel, which enhances the durability of the frame and protects against shifting that can occur in high winds. Welded connections are also included in order to create a more durable base for your canopy roof. Eyebolts are screwed into each fitting section so that you can secure the poles inserted into each opening. As each one consists of 90-degree angles, these fittings are designed for flat roofs only. When ordering your fittings, please keep in mind the size of your canopy roof and the number and arrangement of structural poles. A standard three-by-three frame will need four corner fittings, four side fittings and one center fitting. Each of our parts has been labeled with a simple product code like F3 and F4 to help you determine which fittings to purchase.