TECNIFIBRE CARBOFLEX X-TOP Junior Squash Racket 2023. The Carboflex range is Tecnifibre’s flagship squash racket range and has been used by many of the world’s best players since its introduction in 2004, and the latest development of these X-Top frames have patented technology that allows the removal of the blumper’s plastic inactive material at the top of the racket, resulting in 100% more performance. This junior version is aimed at younger players (approximately age 9 and under) looking to emulate the pros !