Dual sync cords are light and compact connector cables for TTL photography using YS-39 II TTL Duo, YS-90TTL Duo, YS-90DX, YS-90 AUTO, YS-110, YS-120TTL Duo, YS-350TTL/Pro.

Five pin N Type is for Nikonos and MMIII Housings.

Four pin S Type is for Sea & Sea cameras (except MMIII)