Dumbbell spacer for Decathlon / Domyos / Corength

Helps with some exercises, for example overhead triceps extension, hex press, close grip row, etc. Those are much easier if you have hexagonal weights, the round ones are much harder to hold close together without them slipping.
The one on the photo was printed from PLA, 3 outer layers, 15% infill. Works with the 1 kg weights, maybe later I will create an other one for the 2 kg version as well.