GOSEN OG-Sheep Micro 660` Reel 16g 1.29mm The Gosen OG-Sheep Micro 660` Reel 16g 1.29mm Gosen`s traditional synthetic gut 16g string offers good all around performance. It is a consistent playing string for all seasons and any weather conditions.-Gauge: 16 (1.29 mm)-Length: 660 feet-Available colors: Natural... Size - (See Description) | Color - (Natural) Authorized Gosen Dealer. All racquets are strung and ready for the courts! SEE SELLER DETAILS FOR RETURN POLICY.