Dunlop x fire c100 tennis racketh2 the dunlop x fire c100 tennis racket is an ideal choice for beginners thanks to the graphite alloy frame construction with a generous 100 square inch head size tennis racket construction graphite alloy swing type medium moderate head size 100sqinch length 27 string pattern 16 x 19 string tension 52 62lbs 23 28kgs unstrung balance 320mm unstrung weight 270g 95oz redwhite l3