About this 3D model
I designed these to be press-fit (hammer fit actually) with some aluminum tubing I had collecting dust in my garage. They were leftover from a Trex deck project I did a few years back. They store my filament nicely and they let me utilize some extra deck railing spindles I had instead of buying dowels. My spindles measured 19.2mm but have a textured finish. The holes in the brackets are sized at 19.35mm and they ended up being a very snug fit. I used a non-marring deadblow hammer to assemble the spindles into the brackets and it worked perfectly for me. I ended up wanting a bunch more of these, and found this tubing on Amazon that works perfectly! https://www.amazon.com/dp/B0DPH6VFHX If this size/design doesn't work for you, please check out the original model and some of the variations that Maoirae has published.