Merrithew Stability Chair Spring Package

SKU: ST05060This replacement Spring Package for Merrithew™ Stability Chairs™ includes 2 Heavy Chair Springs (red) and 2 Light Chair Springs (blue). Our springs are nickel-plated and heat-treated to protect the base material of the spring to ensure consistent tension throughout demanding studio use.More informationSpring performance 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 Heavy springs Overall length of the spring is 18.6 in with an initial tension of 14.8 lbs (load required to open the coils without extension) Spring rate of 3.9 lb/inch (load required to extend spring every inch after the initial tension is applied) Light springs Overall length of the spring is 18.63 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)Specs Dimensions Length 18 in 45.7 cm Coil Diameter 1.2 in 30 mm Warranty 2 years: All springs For our full equipment warranty, please see our warranty terms and conditions.