This is the Sealife Flex-Connect Y-S Light Mount to Flex-Connect Adapter [SL994]

The Sealife Flex-Connect Y-S Light Mount to Flex-Connect Adapter connects any underwater light or flash with a standard YS mount to the Flex-Connect grips, camera trays, lighting arms, cold shoe mount, and other accessories.

Features:
Adapts YS Mount to Flex-Connect System ...Contact us if you need more help.