Pre-tension: 4 meter long spools, 1.6 mm diameter, factory wound to ensure maximum reliability and superior performance. Compatible with EasyGrassCut models 23, 26, 18, 18-230, 18-260 and 18-26. Premium material: Our replacement spools are made of durable ABS and nylon, flexible, resistant and durable. Easy to use: Snap assembly allows quick and easy replacement without tools. Professional CNC machine cutting and automatic winding saves time compared to manual winding, reduces damage to the lawnmower and eliminates problems during mowing. Warm reminder: Strong centrifugal force and fast cutting speed during use. Wear safety glasses and long pants to avoid unnecessary injuries. Material: ABS, Nylon Color: Black Package contents: 6 spools and wire. The above only includes the package contents and does not include other products. Note: Light and different monitors may cause slight color differences in the images. We strive to reproduce the actual product. The allowed measurement error range is ±1-3 cm. With a customer-focused philosophy, we offer 24/7 customer service. No matter where you are or what problems you encounter, we will solve them for you as quickly as possible, ensuring a worry-free shopping experience.