40mm directional 3D models

Robo 3D Hexagon hot end clip on fan ducts

40mm Speaker

40mm Cooling Fan Cover (12vdc)

Prusa i3 (Sunhokey-tech 3D Printer kit) Triple F...

Dual 40mm clip-on fan holder for Ultimaker

RAMPS 1.4 Fan Mount, 40mm Fan, Customizable

40mm Triquetra Fan Guard

40mm Fan protectorgrid

40mm Snap-on Imperial Fan Guard

NEMA 17 40mm Fan Shroud

Dual 40mm Fan Mount for China Made E3D

E3D Dual 40mm Fan Mount