Great question. Many others ask this question. We currently only offer natural gut in (2) approximately 20 foot lengths. The reason is that it is technically impossible for anyone to manufacture gut longer than about 42 foot strands because the actual raw material serosa cannot be found any longer than these lengths. Good news is that if you are interested in large volume urchases we may be able to work out a special deal for you. A full 660 foot reel normally equals about 17 full sets of strings. If this type of larger volume order interests you please let us know and we will offer you a special discount?

Yes our higher models suggest about a 10-1% pre-stretch. This will help remove any excess play in the gut resulting in better tension maintenance and loss of tension over time resulting in a more consistent high level performance throughout usage.

V5 is a more budget friendly, low tension natural gut that is extremely soft, amazing feel and very good on the arms. Best for the low to mid level player that requires low to mid level pace, but not expecting high durability, reliability and cosmetic perfection.

PROV5 is a big step up to our high line natural gut strings which offer high levels of touch, feel and power. The world's best serosa material is used and is designed for all levels of plays. PROV5 may have 1-2 noticeable defects such as slightly longer or shorter length +/- 1-4 inches in string length, coating blemishes, slight variation in gauge thickness, or basic cosmetic flaws. All very minor details, but nothing major at all. An overall awesome great value high end string.

PROV5(+) is the perfect version of our PROV5 model. No defects and everything about it are flawless. The ideal blend of perfect touch, feel, and power with solid durability as well. PROV5(+) natural gut are simply one of the best natural guts on the market today rivaling the makes of Babolat VS Touch and Wilson Champion's Choice or Luxilon.