Description:Made of high quality carbon fiber and aluminum alloy material, durable to useSuper light carbon fiber with a double ball design, can keep the arm buoyantThis float arm is both for macro and wide angle photographyLightweight, highly durable double ball designIdeal for shooting water activities photos, or diving underwater 100 metersSpecification:Material: Carbon Fiber Aluminum AlloySize Chart:Size: 5inch 127x60mm/5.00x2.36inch8inch 203.2x60mm/8.00x2.36inchBuoyancy coefficientD=60mm L=5inch F=108gD=60mm L=8inch F=310gPackage Includes:1 Piece Buoyancy Aquatic ArmNote:1. Please allow slightly error due to manual measurement.2. Due to the difference between different monitors, the picture may not reflect the actual color of the item.3. Wish you a wonderful online shopping!