This is the fitting for the old Vax machines with 3 lugs (~1994). Newer hoses can be retrofitted with this part to fit the older machines. To be fair, the fitting can be bought online for about £2.00 (Vax ref. 4166), but where's the fun in that?

Youtube video on how to change out the hose end: https://www.youtube.com/watch?v=WxOjFRQJcVg courtesy of VacuumSpot.

Vax manual pdf also uploaded to show the type of machine these were fitted on.

You will need to print supports - especially on the inside, where there is a ring about halfway up the pipe.

FlashForge

Finder

No

Yes

100%

I printed it with standard resolution with a print time of about 5 hours. Supports were needed for the overhangs, but not needed for the small oval cut-outs - my printer coped with those quite well.