Suitable for building 10ft-to-30ft Wideby 32ft-to-40ft Long. You want the 16G, or 17G, or 18G or 20G but not the 22G. If using any gauge above 16G you may need to bore a hole on the footpads so you can tighten it to the legs using bolt/nut if you reside in the very windy part of the USA.
eBay