SummaryIt is a mounting platform to use a 60mm 15-LED angel eye light around the Rostock Max v2 hotend. It snaps onto the hotend platform in 3 places to hold the LEDs in place. The squirrel cage layer fan mount will not fit with this light ring! I will be designing a new one here soon that uses a 30mm fan. See it work: https://youtu.be/C1I-3bAwU-UInstructionsPrint with ABS with 100% infill. I had to go real slow (20mm/s) so the snap hooks printed properly. It is designed to hold a 60mm LED angel eye light. Attach the light to the printed part with some RTV, let cure and then attach to the printer and complete the wiring.