100mm to 125mm ducting adapter

thingiverse

I'm making a ducting adapter for my extractor. I know I can buy these from the store, but I take mine on and off a lot for different tools and store-bought ones never seem to last and the metal ones cut into my plastic ducting if I'm not careful. I cut the model in half so I didn't have to bother with supports and glued it together. It looks a bit rough, but it's a duct, so I didn't care about aesthetics.