This replacement Spring package for Merrithew™ Stability Chairs™ includes 2 Heavy Chair Springs (red) and 2 Light Chair Springs (blue). Best quality springs available! Our springs are nickel-plated and heat-treated to protect the base material of the spring to ensure consistent tension throughout demanding studio use.

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

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

HEAVY SPRINGS

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)

LIGHT SPRINGS

• 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  45.7 cm or 18"
• Coil Diameter    30 mm or 1.2"

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