The Competition Fluorocarbon 50 m is a clear Japanese line with a refractive index close to that of water. Its density, which is greater than that of water, causes it to sink. The material is smooth, non-absorbent, and retains its diameter and transparency. Its low elasticity improves direct contact with the flies. A blue elastic ring holds the line on the spool, and spools can be connected to one another. The 7X is used for the finest presentations; increase the diameter and strength as the size of the flies, the power of the fish, and the risk of abrasion increase. The five available diameters allow you to balance discretion and strength; choose the tip based on the size of the flies, the power of the rod, and the fish you’re targeting.