Curtain glider for I-type rail

Curtain glider for I-type rails common in Finland (I-liuku in finnish). Measurements seem to be fairly standard around the world, but just for reference this model was made for 15x6mm I-beam with 2mm thickness.

Can be used with the curtain hook desing https://www.thingiverse.com/thing:5929760.

If you need U-type glider, the model is here: https://www.thingiverse.com/thing:6689409