These Galena Century Radio (GCR) Brass Contact Stops are used to control the swing of the GCR Rotary Switch Central Assembly’s Brass Finger. They fit all Galena Century Radio control Panels and Rotary Switch bases. The Contact Stops measure 1/4″Dia x 1/2″H x 1.50″ with an 8-32 Thread. This package contains; two (2) Brass Contact Stops, two (2) Brass Flat Washers, and two (2) Brass Hex Nuts.