Description: Package Includes: 1pcs float arm, 2pcs washers, 2pcs cable ties,1pcs O rings. High Quality: Made of high density foam material, durable to use. Perfect Parts: The floating arm can be used in a variety of photography situations, both for macro and wide angle photography Adequate Buoyancy: Lightweight, highly durable design, can keep the arm buoyant. Good Accessories: for shooting water activities photos, or diving underwater photography. Specification: Material: High Density Sponge Size Chart: 5.5cmx5cm: Outer Diameter: 5.5cm/2.17inch, Inner Diameter: 2.5cm/0.98inch, Length: 5cm/1.97inch, Buoyancy: +0.05kg 5.5cmx7cm: Outer Diameter: 5.5cm/2.17inch, Inner Diameter: 2.5cm/0.98inch, Length: 7cm/2.76inch, Buoyancy: +0.07kg 9.7cmx5cm: Outer Diameter: 9.7cm/3.82inch, Inner Diameter: 2.5cm/0.98inch, Length: 5cm/1.97inch, Buoyancy: +0.2kg 9.7cmx7cm: Outer Diameter: 9.7cm/3.82inch, Inner Diameter: 2.5cm/0.98inch, Length: 7cm/2.76inch, Buoyancy: +0.28kg Package Includes: 1 Piece Buoyancy Arm 2 Pieces Washers 2 Pieces Cable Ties 1 Piece O Rings(2 Pack) Note: 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!