See Profoto for example http://profoto.com/us/products/accessories/item/sync-cable-5-m

• ¼' sync cable 5 m 5 m sync cable (PC to 6.3 mm) for ComPact, AcuteB, AcuteB2, Acute2, D4, Pro-7b, Pro-B2, Pro-B3 and Pro-8.

¼' sync cable 5 m 5 m sync cable (PC to 6.3 mm) for ComPact, AcuteB, AcuteB2, Acute2, D4, Pro-7b, Pro-B2, Pro-B3 and Pro-8.Profoto