50mm holder 3D models

Swisscheese... Fanduct with holes.

Naze32 Afromini mount for 50mm holder (with LEDs)

Simple spoolholder

RepRapPro Mendel - Fan adapter 50mm

50mm fan duct

50mm lens holder

Open Hardware 50mm Fan Cover

80mm LED ring Holder for 50mm mounting holes

Cable holder

Nozzle-safe

Double Badge Holder - rounded corners

Filament spool holder