Belkin CAT6 1000-Foot Solid Bulk Cable (Red) Characteristic Impedence: 10015? at 1 ~ 550MHz Conductor Construction: Solid Bare Copper. Conductor Resistance: 93.8?/km/20 DegreeC max. Conductor Size: 23AWG x 4 pairs Dielectric Strength: AC 1.5kV/min Flame Retardant Test: CM. Insulation Material: FEP. Jacket Material: FRPVC Mutual Capacitance: 56pF/m max. Propagation Delay: 536nS/100m max at 550MHz. Spark Test: 2.5kV Standards Compliance: ISO/IEC 11801; TIA/EIA-568-B.2-1 Jacket Diameter: 6.000.20mm Structural Return Loss: 8.6dB min at 550MHz