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.
Dual opto receiver circuit board with shock absorber grommets for 2 ball Stern mechanisms.
Reference:
520-5174-00 opto receiver board no grommets
Replaced by 515-0174-00 board assembly with grommets