extraction fan holders to Replicator

Holders for extraction fan to Replicator2 and similar machines.
Fits the usual 40 x 40 mm fan.
Utgoing hole fits vacuum cleaner hose if it has a diameter of 40mm,
and 48mm on the outside.
It works very well, no plastic smell outside printer
It's good to get away plastic fumes. they're not healthy to breathe, especially abs