This device is a 120 centimeter P1204 test lead set for oscilloscope with male BNC plug to 4mm stacking banana plugs.
Specifications:
Type: RG58 Coaxial Cable
Convert From: BNC Male
Convert To: Safety Banana plug
Impedance: 50 ohm 500V/5A
Length: 120cm
Main lead dismeter:5mm
Sub-line:3.5mm