It's a rack... for lens caps! I also use it to hold my macro tubes. Tested on my Sony E-mount Lens Caps.

The OpenSCAD file is parametric. The diameter and thickness of each item can be set using an array.

// List the thickness and diameter of each item in sequence THICKNESS = [32, 12, 12]; DIA = [62, 61, 61]; // Set the total y and z-axis depth of the entire thing. DEPTH = 62;

Let me know if you've built it! Tag me on Instagram @benjiaomodular.