QualityParts From Oregon That you can depend on. High cutting efficiency – Magnum Gatorline allows you to get cleaner, straighter cuts with less effort than traditional trimmer line: Durable – High-strength inner core resists breakage which means that the line lasts longer and you spend less time winding spools; Round trimmer line – the most popular trimmer line shape. Offers effective cutting for a range of applications. More durable and longer lasting than square trimmer line; .170" diameter trimmer line is ideal for professionals cutting tough brush; Check your user manual for maximum diameter fit-up; Made by Oregon, one of the most trusted brands for trimmer line; Oregon Equipment Parts 22-570 Gatorline Magnum Round .170 5