Original equipment replacement blade for your Coronado 15. This rudder blade is a drop in replacement for your boat's original blade, no modifications to your boat are necessary. Constructed with vinyl-ester resin, molded with an ideal NACA 0012 airfoil shape and coated with white gel-coat. The true airfoil shape maximizes lift while reducing drag, making it faster off the wind, with more control. The boat will point higher, allowing the boat to accelerate in puffs without rounding up.