Wilson pro staff 90 tennis racket the wilson pro staff 90 tennis racket is supplied unstrungwith a 16x19 pattern offering you great accuracy from any location on the court this tennis racket is designed for the advanced players who want the perfect balance between control and feel with amplifeel technology for added comfort complete with a braided kevlar and graphite construction for exceptional performance tennis racket unstrung 16x19 pattern amplifeel braided graphite and