Head graphenext instinct s tennis racket be the best on the court with the head graphenext instinct s tennis racket which due to the new and improved graphenext technology along with its lighter frame gives a perfect blend of increased power manoeuvrability and ultimate comfort tennis racket weight 270 g 95 oz beam 23 52621 mm head size 660 cm 102 in balance 340 mm even length standard 685 mm 27in string pattern 1619 head branding wh