Durable material: lawn mower accessories with durable plastic knobs, lawn mower head, aluminum left aluminum nut (M10x1.25), can be used for a long time. Efficient: The spare spool facilitates the tedious work of manual threading. It is very suitable for mowing the lawn, can optimize the best precision mowing effect, and the cutting efficiency is higher. Size: nylon cutter head size 127.5cm, wire length 2m, diameter 2.4mm, nut size M101.25, optimized to achieve extremely high performance. Size: nylon cutter head size 127.5cm, wire length 2m, diameter 2.4mm, nut size M101.25, optimized to achieve extremely high performance. Strong compatibility: The independent spools of these nylon trimmer heads are suitable for most types of lawn mowers and are highly compatible.