Insulation Piercing Test Clips, Plug and Connector Description Banana Jack, Color Red, Black, Yellow, Length 4 In., Max. Amps 5, Max. Voltage 60VDC, Features Stainless Steel Probe Pierces Insulation On 14, 16 and 18 ga. Wire, Tip Material Stainless Steel, For Use With Banana Plug Test Leads, Accepts 4mm Banana Plugs, Includes (2) Probes, Manufacturers Warranty Length 1 yr.