This precision helical spring opens at a 20g load and extends to approximately 60mm at 100g. It offers a maximum extension of 150mm without permanent deformation, making it ideal for force and elasticity experiments.

Coil diameter: 16mm

Coil length: 20mm

Overall closed length (with end loops): 50mm

Approx. spring constant: 23.5 N/m (may vary slightly between batches)

Perfect for educational and experimental use where reliable spring performance is essential.