Features: Flat suction cup holder with 1 inch ball head, The suction cup is designed to have super suction power on any smooth, non-porous surface. please noted, install the suction cup on a glass or non-porous plastic surface. Features of Double Twist Lock Suction Cup: Two 83mm diameter twist lock suction cup bases-one on each end of the plate Securely fix glass and non-porous plastic surfaces Depending on the harshness of the installation environment, it can support up to 4 pounds Each suction cup is designed to have super suction power on any smooth non-porous surface* Made of high-strength composite material * to get a better video, please install the suction cup on a glass or non-porous plastic surface. Features of double socket arm: Ball holder diameter 1 inch, both ends Arm length: 9cm Material: aluminum + plastic knob The fastening screw on the side of the arm allows the sleeve to firmly clamp a 1 inch diameter ball. When you loosen the side screw, the arm opens and it allows you to connect or disconnect the ball from the socket completely. Please Noted: Selfie stick for Insta360 cameras, lightweight, smooth and stable in use, Material- made of aluminium material, ensure long term use. Extension Stick- with universal 1/4 screw port makes it easier to fit in most sports cameras Please note: please select the correct option based on the picture, If you have any questions, please contact customer service. Be careful to fill in the receipt information accurately. The buyer in Russia must fill in the full name. This is the delivery requirement. Dear customers, please read the product options while you purchasing. If you do not understand, please contact the sellers customer service. Thank you. Ball Head Suction cup Monopod Ball Head and Rod