Modex DCFS Flex K2.1-4mm (Nose-side offset) PERFORMANCE CORE 5-fin set Used only once, the center fin is unused. Aml-M-Axml-M-T-OR. Modex Dynamic Control Fin System Flex K2.1 Front Position -4mm PERFORMANCE CORE 5-fin set A system that allows you to adjust the board's turning characteristics by offsetting the fin positions fore and aft. FCS plug compatible fins. 2. A system that allows you to adjust the board's turning characteristics by offsetting the fin positions fore and aft. 3. Aml M front position -4mm, offset 4mm towards the nose from the standard position, enabling tight turns. The Aml M model is a fin suitable for carving and power surfing. Material: Ultra-lightweight PERFORMANCE CORE Quantity: 5 Type... Fins Fin System/Fin Box... FCS Number of Fins... Five Fins (5FIN)