Black round line spool diameter 3.3 mm for STIHL trimmer - Cutting line for edge trimming and grass cutting - Elastic abrasion resistant and long-term material - Compatible with many STIHL cutting heads CHOOSE FROM THE FOLLOWING OPTIONS: 1- Wire length: 6 m 2- Wire length: 19 m 3- Wire length: 39 m 4- Wire length: 137 m 5- Wire length: 228 m 6- Wire length: 573 m CZ