New manufactured Heathkit T-4 or IT-12  RF - Audio Probe.

Specifications:

ALL NEW

40" - RG58-A/U  Coax    12" - 3/16" Flat Braid

3-1/2" x 3/4" id Copper Tube    Probe Tip .080"

Red & Black Probe Ends Poplar Hardwood

IN192 Diode .001uf Capacitor

SPDT Slide Switch

1/4" Phone Plug & Jack   Alligator Clip

2"x5/8" Insulated Strip