The "SIGLON FC 2020" refers to the 2020 updated packaging for Sunline's Siglon FC, a long-selling fluorocarbon fishing leader line known for its use in various fishing applications due to its softness for light lures and durability for large games.

While the packaging changed, the manufacturing process and inspection methods remained the same as the original product, which has been trusted by anglers for 15 years since its initial release.

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