This is the SeaLife Flex Connect Arm Expand Your Underwater Camera Arm Length Features: Each Flex Arm adds 7 inches in length and 100 degrees of bending motion Add up to two arms on each side of your camera set Easily clicks into place Expand your underwater camera set with one click!" - The Flex Arm allows for creative lighting, easy aiming, and reduced backscatter by positioning the flash or light farther away from the camera. Each arm has 100Adeg bending motion and adds 7" of length. The Flex Arm quickly and easily clicks into a Flex-Connect tray, grip, cold shoe adapter or to the top of another Flex Arm. Up to two arms can be added per side. Made of fiber-reinforced polycarbonate material and stainless steel hardware for maximum durability. "