100ft DS3/DS4 Cable 734 BNC Duplex, CAB-ATM-DS3/E3-E Duplex DS3 734D2 BNC Cables made by Custom Cable Connection Belden 734D2 Silver plated copper for better attenuation performance. Superior structural return loss (35dB typical) and attenuation performance Amphenol BNC Connectors with True 75 Ohm 4.0 GHz rating Made in Dallas, TX Lifetime Warranty