Industry standard case hardened carbon steel 1-1/16 inch (27mm) diameter, 80 gram pinball.

Equivalent to:

Alvin G BAL-001
Bally M-168-26
Brunswick 55-860164-000
Capcom BL00103
Chicago Coin Machine / Stern SEI 6717-C
Gottlieb 21864 MH31
JJP 00-000001-00
Midway 0017-00009-0546
Stern SPI 260-5000-00
Wico 19-587100
Williams 20-6500
Williams 20A-6500

Weight: 3.75 oz.