FCS B5 Bonzer Performance Glass Side Set Surfboard Fin

B5 Bonzer side fin templates for maximum speed, acceleration and hold. Performance Material Overview B5 Bonzer​ quad setup (4 fins) developed by the Campbell Brothers. B5 Bonzer​ quad setup (4 fins) developed by the Campbell Brothers. The Campbell Brothers developed these bonzer side fin templates to work with the concaves of the board, control water flow, and achieve maximum speed, acceleration and hold. Board Types All board types. Will fit the FCS II Fin System when used with grub screws and the FCS Infill Kit. Performance Glass (PG) fins are machine cut from layers of solid fibreglass. 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.