glass aquarium skimmer lower adjustable plug

I broke the original part. originali it was glued two part. not so perfect for torsional force. I was try to copy the original shape but print in only one body (mixed two part in one body)

the rubber o ring it was the original. i dont know what is the replacement size.

the glass part it fit to 12/16 mm tube, I forgot what was the original product name or who to made it. I think it similar size some of other product (measure before printing)

please let me know if you need different size. just few minute modify to fit to different shape or size.