I needed a solid, sturdy shelf to mount things like a modem or fiber ONT. I saw the others on here, but wanted it solid so I could drill holes for captive screws to hold the equipment vs messy zip ties or hook and loop. My finished product turned out great in both PLA and ABS. In cramped or warmer cabinets I recommend ABS as the PLA will likely warp over time. PETG would probably work too, but I haven't tried it.

It is highly compatible with a Calix GigaPoint GP1100x and likely many more ONTs and Modems.