This is the Sealife Ball Joint Adapter for Flex-ConnectFeatures: Connect any brand of underwater light Easily expand your camera system Fits standard 1"/25mm ball joint The new Ball Joint Adapter for Flex-Connect connects any brand of underwater light that uses a standard 1"/25mm ball joint mounting system to Flex-Connect arms, grips, trays and cold-shoe mount. This heavy duty aluminum piece is built for maximum durability, and like all Flex-Connect accessories, it instantly connects nearly all brands of underwater lights to Flex-Connect with just a "click." "