Blower Fan Adapter 50x50x15 to 40x40x10

Adapter for mounting 50x50x15mm blower fan onto 40x40x10mm mount.

Designed for extruder cooling of the GEEETech i3 pro b 3D printer.

For other models, make sure the fan doesn't obstruct full travel of the print head; there's only 5mm clearance on the GEEETech i3 pro b.

For silent operation (intended application), use a 47 or 56ohm resistor rated 1w or more in series with the fan; alternatively use 4 x 1/4w 180, 200 or 220ohm resistors in parallel to make a 1w resistor of 45, 50 or 55ohm