These Roll-Down Springs are made exclusively for Merrithew™ Cadillac/Trapeze Tables, Reformer Vertical Frames and Wall Units. 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. Sold as a pair, includes 4 spring clips. Note: this item is for use with Merrithew™/STOTT PILATES® equipment only. Details: Spring performance 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 19 in with an initial tension of 3.2 lbs (load required to open the coils without extension) Spring rate of .495 lbs/inch (load required to extend spring every inch after the initial tension is applied) Specs: Roll-Down Spring 2.9–3.9 lbs(1.3–1.8 kg) .495 lbs/in +/- 10%(.09 N/mm +/- 10%) 19 in(48.3 cm) 1.2 in(3 cm) Black Warranty - 2 years all springs
