Bullet Points: 1.Reliable Materials: Made of nylon and ABS materials, our grass trimmer thread spools are reliable, wear-resistant, safe, durable, and strong. 2.Easy to Mount: These grass trimmer thread spools are quick and easy to install and remove, with no other tools needed. They are small and lightweight, making them easy to carry and saving you time and energy. 3.Good Compatibility: Ideal replacement for DUR141Z, BUR181, DUR140, BUR141 and other models, these grass trimmer thread spools are widely compatible with different sizes and types of trimmers, making them a practical tool for your gardening needs. 4.Work Efficiently: With these grass trimmer thread spools, you can adjust the cutting length without stopping the trimmer, increasing your work efficiency and saving time. The spools have less drag and are easy to use, making pruning easier and faster. 5.Exquisite Workmanship: These grass trimmer thread spools have round edges that are not easy to break or deform, and a smooth appearance without burrs that will not scratch your hands. Specification: Material: nylon + ABS Packing list: Spool set*1