This spring is for use with the Pilates equipment. We are committed to providing you with high-quality springs. This spring is made of heavy duty spring steel which has a heavier weight and better resistance performance. It is a perfect replacement for original springs. Additional springs can also provide greater resistance for better exercise results.

Wire diameter：
Red - 0.28CM; Green - 0.23CM; Yellow - 0.2CM

Length with rings:
Red - 47CM; Green - 47CM; Yellow - 47CM

Stretch length：
Red - 100CM; Green - 100CM; Yellow - 100CM

Load：
Red - 28KG (61.8LB); Green - 12KG (26.5LB); Yellow - 9KG (19.8LB)