These heavy tension Stability Chair Springs are made exclusively for Merrithew™ Stability Chairs. Each is nickel-plated and heat-treated to protect the base material of the spring. This ensures the quality and integrity of its tension throughout its life through demanding studio use.
Sold as a pair.
Note: this item is for use with Merrithew™/STOTT PILATES® equipment only.
- Our springs are built to withstand vigorous use in professional or commercial environments
- To maintain performance and warranty, springs require replacement every two years
Spring resistance details
- Overall length of the spring is 18 in with an initial tension of 14.75 lbs (load required to open the coils without extension)
- Spring rate of 3.888 lb/inch (load required to extend spring every inch after the initial tension is applied)
|Trapeze Spring / Stability Chair · Heavy Spring||
14.75 lbs +/- 1.5 lbs
(6.7 kg +/- .7 kg)
3.888 lbs/in +/- 5%
(.68 N/mm +/- 5%)
Warranty - 2 years All springs