Wilson Tour Slam Lite Adult Recreational Tennis Racket - Grip Size 3 - 4 3/8", Blue/Black V-Matrix Technology creates larger sweet spot for increased power AirLite Alloy construction creates lightweight frame with power and durability Power Bridge allows for longer mainstrings, optimizing rebound speed Stop Shock Sleeves reduce string vibrations at 3 & 9 for improved feel Oversize head generates impressive power and added forgiveness with enlarged sweet spot Pre-strung