General description High-quality replacement trimmer head compatible with various Stihl models, designed for efficient trimming and thinning. This brush cutter head features a special dual-line design that enhances performance. Technical specifications Replacement tip numbers: 4002 710 2137 / 4002 710 2169 Diameter: approx. 14 cm Bottom threaded hole size: 10 x 1.0 mm Installation Easy to install by combining with a 2.4mm cable. Usage Adjust the nylon line by placing the replacement head on the ground.