New, old stock. Fits Baby Ben #61-L, 61-N & 61-R, Bachelor #S4-C & S5, Big Ben Chime Alarm #69 & #69C, Big Ben Chime Electric #S4D, and Big Ben Loud Alarm #48-D, 48-E & 48-G. #0-80 internal thread. .240” height x .274” OD. Nickeled brass. Regularly $3.00. While supplies last.