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Improved coating also provides slick casting and dirt winds Updated braided core memory the free use and better detection bite; Product description A brand new range of fly fishing Grey and offers excellent performance at a price excelente. step up in quality from the best selling GRX fly line, and the Gama GRXi Features an ultra low core and we feel this is one of the best lines of the casting available at this price.; Product description A brand new range of fly fishing Grey and offers excellent performance at a price excelente. step up in quality from the best selling GRX fly line, and the Gama GRXi Features an ultra low core and we feel this is one of the best lines of the casting available at this price.; A brand new range of fly fishing Grey and offers excellent performance at a price excelente. step up in quality from the best selling GRX fly line, and the Gama GRXi Features an ultra low core and we feel this is one of the best lines of the casting available at this price.