Wilson's Double Trouble BLX in your hand means double trouble for your opponents. Hyper Carbonreg and Power Holes TM combine with BLX to create a lethal weapon with outstanding power and feel. Weight 145 g Length 27' String Pattern 14M x 18C Headsize 76' Composition Basalt, Hyper Carbon Grip Wilson Comfort Hybrid Technology BLX, Power Holes, Hyper Carbon You may also want to purchase Wilson Squash Balls !