Stackable Banana Plug to Plug Test Lead, 4mm, 600V, 32A, 1m, Black - 

The 66.9407-100-21 from Staubli is an Ø4mm high flexible test lead. This test lead is insulated in PVC or silicone especially suitable for connecting electrical devices. It comes with stackable Ø4mm MULTILAM plugs on both ends with protective collar and retractable sleeve to prevent accidental touching. Advantages of MULTILAM are minimal voltage drop, high current-carrying capacity, minimal power loss, minimal contact resistance, highly durable contacts withstand up to 1 million mating cycles, operating temperatures of up to 350°C, higher temperatures permitted for short periods, good resistance to oils, high resistance to vibration, shock and impact, low maintenance costs, very good corrosion resistance and round, flat or spherical types.