1.   Its conical body is built from lightweight graphite composites instead of aluminum.

2.   Pete Sampras is no doubt grateful that the Apollo scientists stumbled across the graphite composites that are de rigueur in the modern tennis racket.

3.   They are made of graphite or graphite composites and weigh less than other recreational models.

4.   Some tennis rackets and golf clubs are made of graphite composites.