https://www.thingiverse.com/thing:5609358 Summary This is a simple electrical tape holder for 25mm (1 inch) wide belts. I should be suitable also for backpacks with MOLLE System. For reference mine is a Stanley Fatmax 1-95-611. I reccomend to print it with PETG for more flexibility and resistance under direct sun light, PLA will probably bend under the sun in warmer days causing a looser fit and increasing the chance to drop it. However if you work / keep your backpack mostly indoor PLA should be fine anyway.