•   Made of premium Nickel Titanium wire
•   Provide continuous forces throughout activation
•   Virtually no permanent deformation with proper usage
•   The tooth moving force of Variable Force Springs gradually decreases over the activation range
•    Size: 7", 15" or 21" spool
 
Helpful Hint:
•   The greater the wire size, the higher the force
•   The smaller the inside diameter, the higher the force
•   The shorter the length, the higher the force