E-FORCE Super 30 DC Racquetball Racket Own your opponent with the Super 30 DC Racquetball Racket from E-Force! With longstring technology, the Super 30 has a tri-carbon frame for greater stiffness and more power. Plus, the Zero Richter Tubes work to reduce sting vibration, giving this racket the winning combination. Longstring Dual cylinder Zero Richter Tubes Tri-carbon frame