10pcs return spring 16 * 18mm return spring torsion spring DIY model making assembling accumulator

10pcs return spring 16 * 18mm return spring torsion spring DIY model making assembling accumulator As the name suggests, torsion and return spring is a kind of mechanical storage structure, which is very common in life! It is made of multi-purpose and elastic steel. Usually like a metal clip, it can clamp automatically because it has a torsion spring inside. Torsion springs can be used as power springs to make torsion bars for tanks and automobiles. Because the torsion bar is small in size and large in torsion, it can also be used as a shock absorber structure of the model car. Dimensions: overall length 18mm, ring thickness 1.6mm, ring outer diameter 6mm and ring inner diameter 5mm Material: Steel Weight: About 1.5g 10