ITEM NAME:Puluz Dual Aluminum Alloy Ball Clamp For Underwater Camera Arm System S2O9 Puluz Dual Aluminum Alloy Ball Clamp For Underwater Camera Arm System S2O9 Brand Name:PULUZ Type:Accessories Set/Kit Model Number:PU3022 Compatible Action Camera Brand:SONY,NIKON Made of hard coat anodizing aluminium, durable to use. Standard clamp used to attach two arm, baase adapters and strobes together. A hard anodized aluminum wing nut allows for easy one-handed operation and will withstand years of use. This standard clamp attaches two 1-inch diameter balls. Thicker plates provide the perfect combination of strength and range of motion. Plates are spring-loaded for easy assembly and breakdown of your arm system. Material:Aluminum alloy Product Size:6.3*5.5*2.5cm Weight:60g colour:black Package Contents: 1 * Ball Clamp