Tags for loose filament with 6mm P-Touch labels

I had a few loose bits of filament from the end of rolls and needed a way to keep track of what's what, without being bulky and of course, being reusable. 

These tags are 7mm wide for attaching a 6mm P-touch printed label. They slide onto your strand of filament so you can put your odds and ends together and still identify them. 

They're pretty flexible being barely more than 1mm thick, and they have a 60mm radius, following the general contours of your coiled filament as you get to the end of the roll. 

The filament holes are ribbed to provide a secure fit with more generous tolerances, accounting for variances in filament shrinkage and printer calibration when printing a 1.75mm hole that needs to fit precisely.