This is a very simple tag that is designed to slip over your beer lines inside your kegerator, to help you easily identify what goes where. It has two holes with an inner diameter of 9mm, so will easily fit on 8mm OD/4mm ID hoses, and probably stretch over 9.5mm OD hose. Designed to be printed in TPU, so it can be flexed, and the elasticity of TPU prevents it from sliding or rotating.

I've provided a basic master file with three tags numbered 1-3, which can easily be modified for different letters/numbers. If you are clever and insert a pause for filament change, you can print the number (top 1mm) in a different colour for contrast. Otherwise, a permanent marker works great.

Prost!