Item Type: Camera Articulating Arm Material: Aluminum alloy Gross Weight: 211g/7.4oz Interface: 1/4in, 3/8in Package List 1 x Camera Articulating Arm 1Premium Aluminum Alloy: The camera articulating arm is made of premium aluminum alloy, CNC process, anodized, with comfortable touch. 2Specially Designed: The ball head knobs on both sides of our camera articulating arm are specially designed, and the diamonded pattern is engraved, which is more labor saving to use. 3Screw Holes: The middle connecting rod of the camera articulating arm is designed with one 3/8in screw hole and two 1/4in screw holes. 4Maximum Connection Length: The maximum connection length of the camera articulating arm is 23cm, and the angle of the support method can be adjusted 360 degree through the ball head. 5Screw Interface: The knob handle position on the top of our camera articulating arm has 1/4in, 3/8in screw interface, which makes it has stronger expansion.