- Get high quality performance with the Wilson Championship Extra Duty Tennis Ball. Wilson has been in the business longer than most so it is no surprise that their tennis ball is top of the line. Featuring exclusive Dura-Weave felt, you will get greater durability, better consistency from shot to shot, and increased performance. Extra Duty felt is intended for outdoor court surfaces.
Head Size: 98 sq. in MP Length: 27 inches Weight (unstrung): 305 g / 10.8 oz Tension: 49-55 Pounds Balance: 3 Pts Head Light Beam Width: 22.5mm Composition: Dynacore XTC / Graphite Flex: 68 Grip Type: Xtra Feel Blazon Power Level: Low String Pattern: 18 Mains / 19 Crosses Mains Skip: 7T, 9T, 7H, 9H Two Piece No Shared Holes Swing Speed: Fast, Long Swing Swing Weight: 331