Bigger, better, faster and stronger, the STOTT PILATES 125% Reformer Spring provides increased resistance for those who seek more challenge in their Reformer workouts. Our new springs offer enhanced fluidity of movement, allowing for maximum extension of the Reformer Carriage with smoother and more balanced movement across all length extensions. Customize Reformer resistance by replacing one or more springs with our extra strength 125% Springs or take advantage of a package savings with our Power Up Springs Package. Designed to meet the demanding needs for cardio work on the Reformer with Jump boards and Cardio-Tramp Rebounders. The best springs in the industry.