I have 3 Wilson K6.1 90's at 3/8 grip. Trying to get rid of them as I switched to a new racket. They're in 7.0-7.5/10 condition. I've had them for a few years. I'm stringer certified and I have a reel of Topspin Cyber Flash 17g. If you buy these rackets from me I'd be more than happy to string it free of charge with my string. Also have some Luxilon 125 Alu Big Banger, Luxilon Adrenaline 130, Wilson Ultimate Duo (Lux + NXT Tour 16). E-mail is email@example.com Willing to trade for a Babolot Pure Storm Tour GT with a 1/2 grip.