It fits for 3D printer timing belt system.
Fits for the belt width: 6mm.
Constant force to Keep the belt reasonably tight to prevent miss step, skip step or unwanted movements.
20 x Torsion Spring
Make sure this fits by entering your model number.
Type: Torsion Spring
Steel wire diameter:1mm
Outside Spring Diameter:5mm
Used for 6mm width GT2 timing Belts
Package Included: 20 x Torsion Spring