Slip Fit System Uprights work with Slip Fit Bases. The hollow opening in the bottom of the Upright slides directly over pins attached to our Slip Fit Bases. Our standard Slip Fit Uprights have fixed heights: 3ft, 6ft, 8ft, and 10ft. We also have a variety of Telescoping Uprights which provide the flexibility to adjust your Pipe and Drape height for each occasion.