As used by Cai Yun (Olympic Silver Medallist)

Technologies:

M PCF : Reinforcing Technology
Handcrafted multi-layered carbon producing multi-directional strength.

H DF : Shock Absorption
High tech and light weight shock absorption materials fill racket head cavities

U HB : High Flex Point
Racket shaft flexes closer to the racket head to produce improved smash and drop shot performance

TB.NANO : Nanometer Technology
Enhanced nano technology bonds carbon fibres to resin to increase the raw material strength by 20%

Weight : 85-89g
Flex : Medium
Balance : Head Light

The name Rocks is inspired from the four character proverb in Sun Tzus Art of War:
When in movement, be as swift as the STORM. When in slow marches be as majestic as the WOODS. When in aggression be as fierce as the FLAME. When in stillness be as firm as the ROCKS

A low balance point and stream lined shape means the N33 is offers low drag and great feel making it the perfect racket for a tactical player.