* Level: Advanced
* Type: Offensive
* Balance: Head Light Balance
* Power Rating: 4 out of 5
* Control Rating: 5 out of 5
* Flex: Stiff
* Frame Composition: H.T Graphite, H.M Graphite, Nanometric, Super HMG
* Shaft Composition: H.M Graphite, X-FULLERENE, Ultra PEF
* Weight: 3U (85-89.9g)
* Grip Size: G4
* Color: Blue/Navy, Iron Gray
* Manufacturer's Recommended Stringing Tension: 3U: 19-24 lbs, 2U: 20-25 lbs
For more details about the technology please click on the YonexUSA site below
http://www.yonexusa.com/products/nanoray-900/