CALIFORNIA WARNING: This product can expose you to chemicals, including lead and DEHP, which are known to the State of California to cause cancer and birth defects, or other reproductive harm. For more information, go to https://www.p65warnings.ca.gov.
Medium / Low tension spring used on pinball machine ball shooter assemblies .028 inch wire diameter.
It's a good idea to replace the outer barrel shaped spring (#10-149) at the same time as this one.
Reference:
Gottlieb 348
10-148-7