Yonex Feather Shuttlecocks are meticulously engineered for distance stability under widely varying environmental conditions of play. Careful attention to the selection of materials and manufacturing ensures outstanding durability under the tremendous shock shuttlecocks receive at impact with today's high-power, high-speed racquets. Their outstanding durability means that a Yonex Feather Shuttlecock needs less-frequent replacement than a conventional feather shuttlecock. Quantity discount on large orders, please call for price!!!