Trimmer line is generally manufactured of nylon material. Several manufacturers deviate from this norm to improve the longevity or trimming efficiency of the weed eater string. To achieve higher strength and break resistance, certain trimmer lines are reinforced composite nylon materials. Elements like Aluminum may be reinforced in nylon trimmer lines. For long-term durability, trimmer lines might be manufactured of non-nylon polymers or other materials. To prevent breakage, a particular trimmer line is strengthened internally. These are only a handful of the possibilities. There are a variety of ways to construct a trimmer line. It is ideal if buyers investigate the string materials that they are unfamiliar with. Then make the best decision to match the best weed eater string to their weed trimmer's task.