The Underwater Writing Slate is the solution for your underwater communication needs. Its features include a 5 x 6" measurement, a heavy-duty attached pencil, and a quick release 1" male/female buckle with quick clip. You can conveniently erase and re-write above and below the water, making it ideal for class settings and perfect for both students and instructors. With this slate, expressing your thoughts underwater is effortless. Measurements: 5 x 6" Heavy-duty attached pencil Quick release 1" male/female buckle with quick clip Easy to erase and re-write both above and below the water Great for underwater class settings Perfect for students and instructors alike