Power bases featuring US box mast base system and transparent urethane tendon. The mast-base of choice for most professional windsurfers. Low profile, wide surface area contacting board for better load distribution, grip padded plate for shock absorption and scratch protection of board deck. Fin box mast base system with urethane tendon, used by most professional sailors /  MXT release system / Low profile /  Wide surface area contacting board for better load distribution /  Grip padded plate for shock absorption and scratch protection of board deck