Carbon Fiber Dual Ball Head Diving Photography Float Buoyancy Arm Camera Underwater Tray Kit Ultralight 5/6/7/8/9/10/11/12 Inch Please kindly know for 5-8 inch arms' Buoyancy le than the product itself weight , so it can't float up, but can reduce product part of weight when put into the seawater. Specifications: Made of high quality carbon fiber and aluminum material, durable to use. Super light carbon fiber with double ball design, can keep the arm buoyant. This float arm is both for macro and wide-angle photography. Lightweight, highly durable double ball design. Ideal for shooting water-activities photos, or diving under water. Item Name: Camera Underwater Float Arm Material: Aluminum Alloy, Carbon Fiber Features: Durable, Easy to Install, Waterproof, Camera Supplies Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. The color of the aluminum alloy parts will be changed by factory. But the Quality is same, Please take it into account before ordering. Thanks understand. Package Includes: 1 x Camera Underwater Float Arm (Others Not Included)