V-Force 4 Petal SetCaracteristicas: Long reed stops added to progressively slow petal tip velocity, for increased petal durability Reduced frontal area of central wing by 15. 6%, combined with a more aerodynamic shape Combined reed tip area increased by 10. 5%, resulting in increased total airflow Rubber overmolding on reed tip surface of cage to further enhance petal life Airfoil shape added to cage tip to increase air velocity from outer ports When ordering