I needed a way to easily move my sun shade around the pool without having to cut the ty wraps off every time. Just attached to the vertical poles on the side of the pool with 3  sturdy ty wraps on each mount. The shade or umbrella pole passes all the way through the upper mount and the lower mount has a bottom to keep the pole from passing all the way through. The hole sizes are 28.5mm for the shade side and 32.2mm for the pool side. Resize if you want a snugger or looser fit. 0.28 layer height, 6 wall loops, 25% cubic infill, use PETG or stronger filament.