Tube Connectors

I am sure these have been made many times before, but i couldn't find any good ones so decided to make my own. This are the first 3D things i made but they work rather good.I use them for my ant colonies, but they should be usable anywhere. Now for the Important Stuff

IMPORTANT IMPORTANT

You can resize these to whatever size you need.

V2 - Interior diameter is 6mm. Version A is normal, Version B has holes to hang on a nail on the bottom. Hanging it works good although I haven't left it