HEAD Youtek™ IG Instinct MP 16/19 Tennis Racquet is Maria Sharapova and Tomas Berdych new weapon. It has been totally redesigned to meet the needs of Sarapova's aggressive baseline game. The racquet comes in 16x19 string pattern and is for players looking for the perfect combination of power, feel, and comfort. These racquets feature all new aerodynamic frame geometry. Their new shape is slim and aerodynamic at the top and solid and stable in the shaft. The combination results in higher swing speeds, better maneuverability and less energy loss during impact - effortless power.With a 100 sq. inch headsize and at a strung weight of 11.2 oz (10.6 oz unstrung), this racquet is for competitive intermediate to advanced players with aggressive, long strokes.The HEAD d3o technology allows a soft touch on volleys and drop shots but also stiffens the racquet when needing an extra power. The IG Instinct MidPlus (16x19) uses a larger comfort DuPont Teflon grommet system in key areas of the frame to reduce friction and increase power.