Prince Ozone 4 Oversized Tennis Racquet (Strung with Cover) Specifcations: Head Size: 110 sq. in OS Length: 27.5 inches Weight: Strung  10.3 oz Unstrung  9.6 oz Tension: 55-65 pounds Balance: Evenly Balanced Beam Width: 24-27-24 mm Tapered Beam Composition: Carbon Wave Matrix Constructions ThePrince Ozone Fourprovides an ideal tennis racquet for players seeking an enhanced sweetspot and maximum control. The Prince Ozone 4 is an update to the Prince O3 Blue and features one of the most generous sweetspots offered in the Prince racquet line thanks to the use of O-Ports that generates a livelier response across the entire string bed. Prince enhances the sweetspot with Carbon Wave Matrix Construction, in which Prince layers the graphite fibers in a wave pattern. This wave pattern complements the angular orientation of the other graphite layers, offering superior power. With a 110 square inch head size and a Prince Power Level of 1200, the Ozone 4 is the middle option in the Ozone series in terms of power and control. Nicely damped feel, with a generous sweetspot and very maneuverable at the net as well.