Torsion spring used to maintain belt tension as belt relaxes over time. Designed for 6mm wide timing belt. Works on GT2 & T2.5 timing belts.
Posted by Pieter on 27th Nov 2014
Good quality and very very stiff. Not used mine yet but it seems like it will do the job if you do not want to manually tighten your belts.
All prices are in USD.