25-2 Trimmer Head: Replaces 25-2; 4002 710 2108; 4002 710 2191. Fit Model for Stihl Trimmer Head: Compatible with FS55, FS55R, FS56 (Since 2008), FS56RC, FS56RCE, FS70, FS70R, FS74, FS76, FS80 (Since 1996), FS80R, FS83, FS85, FS85R, FR85, FR85T, FS87, FS90 (Since 2005) String Trimmers. For FS 56 RC Stihl Parts: Compatible with FS90R, FS91, FS91R, FS94, FS94R, FS100, FR106, FR108, FS100RX, FS110, FS111R, FS111RX, FS120, FS240, FS250, KM55, KM56, KM85, KM100, KM110, KM120, KM130, KA85, KA85R, KR85, FS-KM, FS130, FS130R, FR130T, FS131, FS131R, FS200 (Since 1997) String Trimmers. For FS90R trimmer head: Bolt adapter size is 10mm x 1.0 LHF and comes pre-loaded with .095"(2.4mm) line for immediate use, allowing use of .080", .095", or .105" Trimmer Line; The nylon line automatically adjusts by tapping the cutting head against the ground. Package Included: You will get 1*25-2 Bump Feed Trimmer Head. It fits for brushcutter, weed Eater, clearing saws and electric trimmers. We will provide every customer with a convenient shopping experience for trimmer heads. If you have any quality problem, please contact our customer service team in time, and we will try our best to solve your problems. 25-2, 4002 710 2108, 4002 710 2191