This racquet features ‘Impact Speed’, a snap-back action that stores energy on impact, and releases it with tremendous power and speed. The new material, Cup-Stack Carbon Nanotube, was adopted in these racquets to lead the ball to accelerate faster on each serve or return shot. Stronger players seeking custom options will find room for adding weight. If you are a player at the 3.5 to 4.5 level looking for a maneuverable racquet with a solid feel, definitely take this one for a demo. Specifications: Headsize: 100" Length: 27.5" Beam Width: 28-19 mm Weight Strung: 303g/(10.6 oz.) Composition/Construction: HM Graphite, Elastic Ti., CS Carbon Nanotube String Pattern(Mains X Crosses): 16x18 Recommended String Tension: 50-65 lbs. Product Reviews: Best racquet I have ever played with! If you're looking for a top-of-the-line player's frame, this is definitely the racquet for you! I've been playing for as long as I can remember, and I have never played with a racquet that has given me so much comfort and control, not to mention hefty power along with it! – Mark, Union City, California, USA