Spitfire Classics Formula Four 99 Duro - Various Sizes £64.99 Variants 52mm - Green - £64.99 53mm - Orange - £64.99 54mm - Silver - £64.99 55mm - Yellow - £64.99 56mm - Blue - £64.99 Quantity Add to Cart This item is a recurring or deferred purchase. By continuing, I agree to the cancellation policy and authorize you to charge my payment method at the prices, frequency and dates listed on this page until my order is fulfilled or I cancel, if permitted. This variant is currently sold out Please fill in the form below if you'd like to be notified when it becomes available. Your Email The #1 Shape in skateboarding worldwide - proven for speed and control.