Versatile, high performance fin. Connect turns and move up and down the board. Plate & screw fastening. Overview Neutral, well balanced template. Versatile, high performance Longboard (LB) fin for all conditions. Offers a combination of drive, speed and response for modern longboarding. Turn and Connect: Seamlessly connect turns and move up and down the board. 2 1 Compatible. Plate & screw fastening. Performance Glass Performance Glass (PG) fins are machine cut from layers of solid fiberglass. These fins are stiff, and are widely used by pro level surfers because the integrity of the flex is maintained under immense force, and in the most extreme of conditions and situations.