Headsize95 sq.in Length27 Strung Weight 10.8 oz 305 g Unstrung Weight 10.2 oz 289 g Cross Section 20.7 mm Flat Beam Balance 1 pt. HL CompositionConstructionBasalt, Karophite Black String PatternMains X Crosses18x20 Recommended String Tension50 60 lbs No CoverThe Six One Team BLX is the answer for those players that are younger or simply prefer the lighter swing weight that makes this model so appealing. The addition of BLX technology brings the feel and powerful precision of the Six One family to a broader range of tennis. Basalt fibers are woven longitudinally with Karophite Black to create a composite that delivers clean feedback and a better sensation for the perfect feel. This frame also features Double Hole technology for more string movement and a larger sweet spot. Recommended for players with moderate to fast swing styles and for levels 4.0.