ULTNICE Large-sized Swivel Clasps Lanyard Snap Hook Split Ring Key Holder 17/16x5/16inch Pack of 5 Color: red and black. Material: durable soft silicone and copper wire. Each wire length: about 1 meter. 2M in total includes 1M Red 1M Black silicone wire. Super low electrical resistance for a highly efficient connection. Conductor size: 16 AWG. Wire diameter: 3.0mm. Number of copper wire: 252 strands. Nominal voltage: 600V. Test voltage: 2000V. Maximum current: 35A. Temperature range: -65C to +200C.