These utilize Dunlop's Max Core and Durafelt HD Cloth to deliver a premium performance tennis ball for a wide range of players. Max Core is designed for use with lighter, non-woven cloth. Durafelt HD Cloth is a premium non-woven cloth that plays consisteny and with good durability. The Dunlop ATP Championship Extra Duty Tennis Ball is a great tennis ball for all court surfaces with excellent durability for long-rallies and play. 

• 3 Ball in a tin
• Extra Duty 
• Hard Court
• United States Tennis Association Approved
• International Tennis Federation Approved