Head Graphene Instinct Lite Tennis Racquet The Graphene Instinct Lite is a lighter version of the Graphene Instinct MP used by tennis pros Maria Sharapova and Tomas Berdych. With a 107 sq. inch head size and weighing in at 10.4 oz strung, the Graphene Instinct Lite is a treat to play with. Very nimble feeling at both the net and baseline. Headsize: 107 square inches / 690 sq. cm Weight: (unstrung) 9.9 oz / 280 grams (strung) 10.4 oz / 295 grams String Pattern: 16 Mains x 19 Crosses. Racquet is strung at mid tension and does not include a cover.