Pacific PC13440000 Tough Gut 16 - Natural String Pacific Tough Gut 16 (1. 30mm) provides players with what they have always wanted, a more durable natural gut string without sacrificing everything that makes natural gut popular... Durability | Power | Control Size - (See Description) | Color - (See Description) Authorized Pacific Dealer. All racquets are strung and ready for the courts! SEE SELLER DETAILS FOR RETURN POLICY.