1.Blade size:18*48cm,18*48cm(with spline),16 ... ,90%carbon,100%carbon(10cm adjustments) 3.length:customize Blade optionSK-ISK-II(with spline) SK-TBlade area685cm2685cm2625cm2Blade size18 ... are at both ends of the shaft, the scooped blade help dig deeper in the water and hold more ... *38cm)Payment:By Paypal (only for sample order),Bank Transfer (T/T) . 50% prepayment when ordering, 50% final payment before ...