BLX racket technology is engineered with Basalt fibres, combining proprietary frame, grommet and grip technologies to provide the perfect feel. Basalt fibres are woven longitudinally with [K]arophite Black filtering unwanted extreme frequency, delivering clean feedback with a better sensation and feel.Specification:*Headsize: 495cm2*Weight (unstrung): 138g*Balance (unstrung): 36cm*String pattern: 12 x 18