Head's Radical S in the Graphene 360+ tech story.  It comes strung with the string of your choice. If you'd like this racket unstrung simply type "unstrung" under string type. If you'd like a string that's not listed please feel free to write it in.
 
Synthetic Gut Options: Tour Super 850 16 - Velocity 16 or 17 - Live Wire XP 16 or 17 - NXT Power 16 or 17
 
Poly Options: Tour Bite 16 - Big Banger - Cyclone 16 or 17 - Hawk 17
 
Hybrid: Pick one from each category.

Head Size: 102 in² / 660cm²
Length: 27 in / 685mm
Unstrung Weight: 9.9 oz / 280g
Balance:  1 in HL / 32.0cm
String Pattern: 16 x 19
Recommended Tension: 48-57lbs