1.Perfect Compatibility: Fits single-line auto-feed cutting system, 2.High-quality materials: String trimmer spools and covers cut grass and weeds easily. Made of high-quality plastic and nylon, they are pliable and flexible, allowing to stretch and cushion the impact with hard surfaces, and the aerodynamic shape reduces drag for more efficient cutting. 3.Easy to Install: You can quickly assemble and disassemble by hand, no other tools are required. The auto-feed system replacement spool simplifies the tedious work of manual winding. Save time and energy. 4.Stable and Efficient: Factory pre-wound for maximum reliability, less tangling while working, saving your time and energy. It is an ideal replacement part for your -per Tou-gh weed edger. Colour:Photo Color Material:Nylon + Plastic Package Contents: 12 x Scroll 2 x Lid 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.