DESCRIPTION
FACTS
CPI 400
Weight (unstrung) 305 g / 10.8 oz
String Pattern 16/19
Head size 630 cm² / 98 in²
Grip size 1-5
Balance 315 mm / 1 in HL
Length 685 mm / 27.0 in
Beam 22/23/21 mm
TECHNOLOGY
![](https://cdn-mdb.head.com/htm-scaler/418851.150.90.jpg)
AUXETIC
Auxetic constructions show a unique deformation compared to non-Auxetic constructions. Due to their internal properties, Auxetic constructions widen when a “pull” force is applied and contract when squeezed. The bigger the applied force, the bigger the Auxetic reaction.![](https://cdn-mdb.head.com/htm-scaler/363773.150.90.jpg)
SPIN SHAFT
The spin shaft provides optimized lateral stability, creating higher spin potential![](https://cdn-mdb.head.com/htm-scaler/363767.150.90.jpg)
SPIN PATTERN
The open 16/19 string pattern maximizes string snap-back for greater spin generation![](https://cdn-mdb.head.com/htm-scaler/363782.150.90.jpg)
SOUND GROMMETS
Sound grommets provide enhanced power via greater string movement and optimize sound and vibrations![](https://cdn-mdb.head.com/htm-scaler/363780.150.90.jpg)
SPIN GROMMENTS
Spin grommets allow for greater main string movement in all directions for maximizing power and spin.![](https://cdn-mdb.head.com/htm-scaler/418850.150.90.jpg)