General description High quality replacement cutting head compatible with a wide range of Stihl Autocut models including FS44, FS55, FS56, FS65-4, FS70, FS80, FS83, FS85, FS90, FS91, FS94, FS100, FS110, FS111, FS120, FS130, FS131, FS200, FS240, FS250, FS260, and FS260R. This replacement cutting head is designed for efficient cutting and thinning. Technical specifications Replacement cutting head number: 4002 710 2137 / 4002 710 2169 Diameter: approx. 14 cm Bottom thread hole size: 10 x 1.0 mm Usage Compatible with a 2.4 mm nylon line for effective cutting. The nylon line can be easily adjusted by placing the replacement cutter head on the ground.