| MPN | PH0713 |
| Brand | Eisco |
| Manufacturer | EISCO |
| UPC | 849230045562 |
Eisco Labs Harmonic Motion Spring. The Harmonic Motion spring's elongations are closely proportioned to the applied forces, making it easy to use. The windings of this truncated cone, made of spring brass wire, interfere with each other less than those of a helical spring, making the motion truly sinusoidal.