Tezla Audio 4 Gauge Ground wire Hyper-twist 1862 strands tinned copper construction, black flexible jacket, O.D.: 10 mm, 100 FT / 30.4 meter per spoolTezla Audio 4 Gauge Ground wire Hyper-twist 1862 strands tinned copper construction, black flexible jacket, O.D.: 10 mm, 100 FT / 30.4 meter per spool