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.
Large filter capacitor with screw terminals used on most early solid state Williams pinball machines.
Dimensions are 4-1/2 inch tall x 1-3/4 inch diameter.
Reference:
C18KM25VR
Atari 29-057