[Compatible models]:Compatible with for Electric String Trimmers models:UT41120,UT41112, UT41113, UT41121, UT41122, UT41112B. [Spool Specification]:Spool Model:AC41RL3&AC41RDLB;Cap Model:AC41HCA. [High quality products]:Spools by the CNC machine cutting and winding, automatic line change. High-quality ABS spool & polyamide nylon thread, flexible and long service life. Aerodynamic shape allows less drag for more efficient cuts. You need to confirm your String Trimmer Models. If they are compatible with your device Colour:Black+Blue Material:ABS+nylon Package Contents: 6 x replacement trimmer line spool 1 x replacement spool cap Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.