Features: High strength aluminum ensures light weight durability and superior corrosions resistance for effortless underwater maneuverability during extended dives. Optimized back inflation design evenly distributes buoyancy pressure, enhancing balance and stability across varying depths while maintaining a streamlined profile. Ideal for novice divers mastering buoyancy control, professional instructors conducting training, and dive teams requiring quick visual identification in water environments. For oceans exploration, pool based skill drills, and group diving expeditions where bright color elections improve teammate recognition and safety coordination. Adjustable harness systems enables instants customization for multiple users, eliminating gear switching hassles during family vacations or dive club excursions. Specifications: Color:Three Choices Dimension:26×40×22cm/10.24×5.75×8.66in Component:Aluminum materials Package Includes: 1pc Diving backfly aluminum backplate note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you will not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.