The Dunlop CX JR 21 Prestrung Tennis Racquet is a shorter length composite version of Dunlop's premier CX racquet line. This version is designed for helping young ones develop coordination and skills for tennis. The racquet is constructed of a durable aluminum for greater stability. The CX JR 21 is only 6.5 ounces unstrung so it is perfect for kids who are developing their swings.