Dunlop force 100 tour tennis racket gain the ideal blend of force and power from the dunlop force 100 tour tennis racket the ideal piece of equipment that accelerates extremely powerfully upon contact bring a precise and crisp touch this racket has an open 16x19 string pattern beam width of 23 26 24mm head size of 100 square inches unstrung balance of 320mm and a string tension of 23 28kgs an ideal racket for advanced tennis players looking for full fast swing speeds with incredible pow