Tinned copper 7/0.254 Polyolefin insulated ID:1.27mm. Pairs color coded Red & Black. Each pair individually shielded with aluminum-polyester shield. Individual pairs with numbered and white color PVC jackets OD:3.0mm Overall aluminum-polyester shield. Overall black matte PVC jacket with nylon ripcord. Pair jackets and shields are bonded so both strip simultaneously with automatic stripping equipment. Nom.P.C.R.:57.12ΩKM Nom.Capacitance:102PF/M