The ball clamp made with aluminum alloy processed by anodisation is fits for 1 inch ball mount, with which you could connect to ball mounts together, such as that of photography light and arm tray, to acquire a better diving photography experience. Premium material and advanced technology allows a longer use. Features: Material: Mainly aluminum alloy construction, Features solid construction, abrasion resistance and rust protection. Processing: Modern anodisation surface treatment tech, enhancing corrosion resistance and antistatic performance. Spring: Premium spring inside making the ball mount be held tight, but also has a certain flexibility underwater. Installation: Adopting tool-less design for easy installation, lightweight to carry and fast to start up with. Application: Kindly designed for underwater photography as a clamp connector, making 1-inch standard ball heads linked. Specifications: Material: Aluminum Alloy Color: Black Item Size: 7 * 5.5 * 3cm / 2.8 * 2.2 * 1.2in Item Weight: 60g / 2.1oz Package Size: 7.5 * 6 * 3.5cm / 3 * 2.4 * 1.4in Package Weight: 62g / 2.2oz Package List: 1 * Ball Clamp