This is an Elinchrom Sync Cable 3.5mm to Amphenol - 15.75" (40 cm) that fits older Elinchrom packs and moonlights that have the lock-ring style of sync connection. This cable connects the EL-Skyport Universal Receiver to Classic Elinchrom flash units with the EL-Amphenol Syncron socket. The mono jack is 3.5mm. The cable measures 15.75" (40 cm).