Piezas genuinas Vibroplex #4000 pieza de dedo, #4001 pieza de pulgar, #4026 tornillo rojo
Vibroplex #4000 red knob and #4001 red thumb piece for bugs and Vibrokeyer. Fits all models of these keys 1945 to present. 8-32 thread pitch on stud insert. Includes #4026 4-40 screw for front hole of thumb piece.