Dunlop M-Fil 5 Hundred Tennis Racquet This racquet from around 2005 looks new, with the exception of a few abrasions on the grip. Fresh looking 16 gage Gamma Live Wire strings at 56 pounds. 10.40 ounces as pictured with dampener. Dunlop M-Fil 500 Specs from Tennis Warehouse Head Size: 105 sq. in. / 677 sq. cm. Length: 27.25 inches / 69.22 cm Strung Weight: 9.90 oz / 281 g Balance: 1pts HH Swing Weight: 311 Beam Width: 0.0mm Tip/Shaft: 24.0mm / 26.0mm Composition: Graphite Multifilament Power Level: Medium Stiffness: 67 String Pattern: 16 Mains/19 Crosses Main Skip: 8T,7H,9H String Tension: 53-63 Dunlop 5Hundred A 100% 3D braided Hotmelt Graphite racquet combining Carbon, R-Fibre and Boron into the sweet spot of the racquet. The 5Hundred is the ideal racquet for club players seeking a comfortable racquet with exceptional touch and feel, coupled with extra power, in a lightweight frame. M-Fil (Multi Filament) is a combination of three crucial materials that are incorporated into the sweet spot of the racquet head to enhance the touch hand feel of the racquet where and when you need it most - at the moment of ball contact. M-Fil racquets are also 3D braided, so unlike conventional racquets the fibres are layered in three directions, with the third fibre aligned at zero degrees. This also enhances the touch and feel compared to traditional UDPP or 2D braided racquets. Similarly the 3D braided structure at these key points supports torsional stability at ball contact while frame deformation is similarly reduced which in turn helps to enhance dwell time on ball impact. International Tennis superstars such as Amelie Mauresmo , Tommy Robredo , and Tommy Haas all trust Dunlop's Multi-Filament Technology to be in their racquet of choice.