I have purchased all the pipe and fittings to make one like this but have been too busy sewing to put it together. I purchased the clamps on line and they are 1 inch and fit very tight on the 1 inch pipe. In fact I am afraid too tight but we will see when I get it finished. I am making mine smaller 30 x 20 since only I will be using it and everything has to be smaller in an RV!