ShopVac coupler for 2.5 inch hose

This is a coupler for ShopVac 2.5 inch hose. Made in OpenSCAD. Initial size was based on measurements of a commercially purchased coupler. Needed to tweak for printing, so went through some trial and error to get the best sizes/taper.

I've printed this and using with multiple hoses. Recently made, so the "test of time" has yet to come, but so far they are working well.