1-1/2" x 1/2" Red Flipper Rubber.
Sold individually.
50 durometer natural rubber.
This is the standard size for all modern 3" flippers with the exception of Gottlieb.
Reference Numbers:
Bally #R-406-3, #R-533-3, #23-6519-4 & #17-41-682.
Early Stern #7A-121-R.
Williams #23-6519-4.
Sega/Stern/Data East #545-5024-02 & #545-5277-22.
Jersey Jack Pinball #25-002001-02.