Prince O3 Hybrid Spectrum Mid Plus Tennis Racquet (Strung with Cover) Specifications: Headsize: 100 Length: 27 Beam Width: 23-25-22 mm Titanium Tungsten Carbon Graphite. String Pattern (Mains X Crosses): 16x19 // Recommended String Tension: 53-63 lbs. Balance: 13.0 in // Head Light // Power Level: 928 O3 Technology provides a larger sweet spot and reduces drag from anywhere on the court to keep you playing your best. Designed with a softer more flexible shaft the Spectrum offers a great blend of power and control for all-around players // Weight Strung:300g (10.5 oz.) // Swing Weight: 290 // Swing Type: Moderate to Full Strokes // Recommended String: Lightning XX 16g. Hybrid racquet combining conventional grommet system with O3 technology