Thread Spool Caps

Turns out when you have a printer people find things for you to make, I was asked to make replacement spool caps for a sewing machine. I don't know the make of the machine just that the rod was 6mm so the opening is 6mm that tappers slightly to create a compression fit. Not all machines are the same so its worth checking the diameter on your machine. I suppose you can scale the model up or down to change the opening. The small is 25mm, medium is 35mm and large is 45mm if you scale the models