Length: 4" | Thickness: 16 gauge | Construction: Galvanized Steel | Packaging: Bulk Packaging. Used to add side pipes to an existing canopy frame. They are used to add side panels to any canopy. 4 are required for every canopy. Act as the middle pieces to the side railing. Designed for use with 1-5/8" pipe. Properly secured with 1/4" x 2"