A powerful little spring for things like tensioning extruder idler bearings and suspending heated beds.
Don't settle for puny springs salvaged from pens - these will provide you with the force you need to really grip filament without having to over compress your springs.
Also great for suspending your heated bed for adjustable levelling.
7.5mm Outer Diameter
1mm Wire Diameter
1 X Compression spring - 20mm x 7.5mm