With the Graphene XT Speed REV Pro Head offers its revolutionary Adaptive String Pattern. This technology features interchangeable grommets at 3 & 9 o'clock so that the player can select a 16x19 or 16x16 string pattern.Offering impressive stability for its light weight, the Speed REV Pro is ideal for a wide range of players. With its crisp and lively feel, this racquet offers a nice blend of power and precision. Thanks to its extended 27.4" length, the REV Pro puts extra momentum in the hands of those looking to ratchet up the pace and spin. Although not as stable as a traditional player's racquet, our TW playtesters found this stick surprisingly stable for a light racquet. With its Graphene XT weighting system, there is extra mass in the tip which translates into blistering pace on full swings. The 16x19 string pattern supplies a great balance of spin, pop and precision. Players looking to hit with even greater spin and depth should love the 16x16 option. At net this racquet feels speedy and offers some impressive put-away power. The extra length makes for some explosive overheads and serves, making this a great option for aggressive doubles players. The Speed REV Pro, with its very manageable weight and lively feel, is a great option for any player looking for a spin friendly weapon with truly impressive versatility.*This racquet is compatible with the Sony Smart Tennis Sensor.SPECIFICATIONS:Head Size:98 sq. in. / 632.26 sq. cm.Length: 27.4in / 69.6cmStrung Weight: 9.84oz / 278.96gBalance: 13.7in / 34.8cm / 0 pts EBSwingweight: 316Stiffness: 61Beam Width: 22mm / 22.5mm / 24mm /Composition: Graphene XT/GraphitePower Level: Low-MediumStroke Style: Medium-FullSwing Speed: Medium-FastRacquet Colors:Black/ WhiteGrip Type: Head Hydrosorb ProString Pattern:16x16 OR16x19Mains skip: 8T, 8HTwo PiecesNo Shared HolesString Tension: 48-57 poundsString Tension: 48-57 lbs / 22-26 kg