The wilson whip 155 blx squash racket has a 755in2 487cm2 head and an open 14x18 string pattern which provide more potential for power and spin the racquet is light weighing 155g 55oz and has a head heavy balance features which combine for good playability the size of the sweet spot and the movement of the string bed have been optimised by the power hinge technology letting you play with more power the blx system makes for better feel by reducing vibrations and the sensation strike