My friend received Bob's racquet after they won in Toronto. He was in the friends box for the finals on Sunday. I had the racquet in my hands yesterday and the racquet had clear strings in it. I couldn't tell what string it was. The racquet also had metal grommets on the either side where the big holes/slits are in Prince EX03 sticks. I do know that there is no lead on the frame and it is a stock frame. The grip is also stock with the ResiPro with no alterations other than tournagrip wrap. It is 95" frame which was strung at 51#. I asked my friend and his only answer about the strings is " they are Prince because thats who sponsors them ". My friends son is Bob's usual hitting partner in Florida.