Very similar response to the previous Drive Z Lite, but this version offers improved comfort and feel thanks to the Cortex System. Head Size 100 sq. in. 645 sq. cm. Length 27 inches 69 cm Unstrung Weight 9.0oz 255g Balance Head Heavy Beam Width 24 mm Head 26 mm Hoop 22 mm Shaft Composition Graphite Zylon Matrix Power Level Low Medium Swing Speed Fast String Pattern 16 19 String Tension 51 57 pounds