4Pcs Underwater Camera Buoyancy Float Kits, Buoyancy Provided 175g*4, Diameter 3.15", Thickness 1.5", Aquatic Arm Float Kit for Seafrogs/nitescuba/Starbea Floating Arms Diving Tray

Superior Buoyancy: Our underwater buoyancy kits are designed to deliver high buoyancy, owing to their high-density, high-hardness, and strong compressive strength properties. They can withstand up to 5 bars of water pressure, with less than 2% deformation at 41 meters underwater, and a maximum depth of 50 m/164 ft.
Lightweight and Stylish: The surface of the buoyancy floating arm is black, giving it a simple appearance with an inner diameter of 1 inch. It is compatible with various YS/double ball light arms and underwater trays on the market, including Seafrogs, nitescuba, and Starbea strobe arms.
Versatile Solution: 1 pcs of floating block provides -175 g buoyancy, allowing you to add or remove floats to achieve the perfect amount of buoyancy for your camera system, depending on shooting style and conditions. The black float is easier to store you can either put it on your arm or store it in an air mesh bag.
More Efficient: More lightweight and cheaper compared to a traditional carbon float arm, the 51 g self-weight buoyancy block provides -175 g buoyancy, while a 155 g carbon fiber float arm provides 300 g of float. The float block will not flood and is affordable