This is a Mizuno Fortius 10 (4U). I didn't use it as my main racket, but I did use it occasionally, and it made contact with something once. Please check the photos. I bought it on the release date, so it's likely from the first production run. The string is Exbolt 65, strung at 24 lbs. The original grip is not included. A dedicated racket case is included. Thank you.