1 year manufacturer warranty. Brand new unstrung racquet. Art#:230013-u20 The 16x19 open string pattern offers extra bite for increased spin potential. Medium 10.6 oz (unstrung) weight for increased maneuverability. . Featuring GRAPHENE, the world’s lightest and strongest material. This extremely strong and light material enables the designer to redistribute the racquets weight to the top and bottom of the frame. This revolutionary design allows you to generate more power with less weight and less effort. Let your game accelerate to new levels with a Graphene frame! This series retains YouTek d3o™ technology which is able to sense the needs of the player during different strokes (it's able to adapt to you). On high-speed impacts (aggressive shots), the smart molecules lock together within nanoseconds and dramatically increase the stiffness of the whole racquet frame to provide maximum power. On slow-speed impacts (slice or drop shots), the d3o™ molecules absorb the impact to provide a softer touch for better feel. The Head Swing Style Rating for this racquet is L5. This racquet DOES NOT include stringing and is sent unstrung. Specs: Headsize: 100 square inches / 645 sq. cm Length: 27 inches / 68.5 cm Weight (unstrung): 10.6 oz / 300 grams Weight (strung): 11.1 oz / 315 grams Balance (strung): 3 points head light / 32.5 cm Swingweight (strung): 310 Beam width: 22 mm Flex: 66 Composition: Graphene / d3o Grip Type: HydroSorb Pro Strings: Unstrung Unstrung Unstrung String Pattern: 16 Mains x 19 Crosses Recommended String Tension: 50-60 lbs. Cover included: No Condition: New in packaging Warranty: 1 Year Manufacturers Regular Retail: 230.00