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.

Merrithew™ springs are built to withstand vigorous use in professional or commercial environments

To maintain performance and warranty, springs require replacement every two years

• Overall length of the spring is 18.628” 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)
• Length  45.72 cm or 18"
• Coil Diameter 30 mm or 1.18"

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