2 used customized Dunlop BioFibre M3.1 with a 4 3/8 Grip. There is added silicone and weight in the handles. The racquets are about 12 oz, with a moderate swing weight change. They both have fresh Tourna overgrips. The black string appears to be Pro's Pro black force at 48lbs, while the natural color looks like Luxilon big banger original at 52lbs. I bought these two on here a couple months ago. They were used at the time. I was looking for some player's racquets that were also arm friendly, and these fit the bill nicely. Unfortunately, I've injured my right foot, and have to put up the sport, probably for good. My loss is your gain here. Please don't hesitate to ask any questions you may have.Stock specs:Headsize: 98 sq. in.Length: 27.00 in.Weight (strung): 11.10 oz.Stiffness (Babolat RDC): 63Balance: 13 in. Head Light (4 pts)Cross Section: 22 mm Flat BeamSwingweight: 315 kg*sq. cmString Pattern: 16x19Grip: Dunlop Synthetic