Features: The bowl adapter allows you to convert 75mm bowl mount tripods to a standard 3/8" stud screw flat. If you have bowl type tripod and have flat mount type fluid head, the adapter will be helpful. Made of aluminum alloy, very durable. Compatible for Manfrotto 501, 502, 504 tripod heads and other tripod heads with 3/8" screw hole. Comes with 1/4" screw and 3/8" screw, convenient for you to directly mount quick release plate on the bowl adapter. Specifications: Color: Black Material: Aluminum alloy Bowl Diameter: 75mm Head Screw: 3/8" Screw Mounts: 1/4" & 3/8" Item Weight: 285g / 10oz Package Size: 10.5 * 8 * 7.5cm / 4.1 * 3.1 * 3in Package Weight: 370g / 13.1oz Package List: 1 * 75mm Half Ball Flat / Bowl Adapter 1 * Spare Long Screw (3/8" mount) 1 * 1/4" Camera Mount Screw 1 * 3/8" Camera Mount Screw 1 * Hex Wrench