Tempered fishing lines STROFT – ABR, GTM, FLUOR have been among the absolute top in recent years and represent HIGH-TECH in this industry, as evidenced by the gold, silver, and bronze medals won at the recent world and European championships in all categories of sport fishing. What is tempering: this term refers to additional heat treatment within a precisely defined time frame and at a specific temperature. During tempering, internal stresses in the material that arise after pressing, during cooling, and hardening are eliminated. At the same time, the surface is strengthened and thickened by sealing silicone-teflon molecules.