Eight canopy base fittings, 5.5” diameter base with 4 holes Galvanized steel Use these fittings with 1-3/8 inch outer diameter top rail pipe Useful for building outdoor canopies, chain-link fences, animal pens, and more Returns may be subject to a 20% restocking fee These galvanized steel canopy base fittings can be used with 1-3/8 inch outer diameter top rail pipe to build outdoor canopies, chain-link fences, animal pens, and more. Returns may be subject to a 20% restocking fee.