aluminum alloy, lightweight and with long time use The bottom is 3 / 8 screw female interfaces, and the top is 3 / 8 screw male interfaces with a diameter of 15mm Widely used for live streaming, video, radio and more Aluminum alloy 3 / 8 female male screw extension rod, available in two lengths Can use for products with 3 / 8 screw interfaces such as tripods, selfie sticks, DSLR cameras, camping lights