Vertical Pipe Mount Spool Holder for 1" ID Iron pipe

I made this to be able hold spools on black iron pipe that I used as a shelf system. You can potentially mount as many spools vertically above and below each other as you have room for on the pipe. While my piping is holding shelves, I mounted my holder between the shelves. But you could mount piping from floor to ceiling and hold a dozen or more spools. I recommend printing this with at least 20% infill and at least 1.2mm walls for clamping strength.