Nylium Starline is one of the best performing brands of trimmer line today. With a .105-inch gauge, this long lasting, premium co-polymer material comes on a 1/2-pound donut. This red trimmer line has patented nylium aluminum-particle additives that greatly reduces the incidence of line breakage and helps prevent line welding in the head. It has a 5-sided shape that works fast and cuts clean.