Premium Material: The trimmer replacement cord is made of high-quality raw materials. The ABS spool is durable, and the nylon cord is flexible and resistant to breaking, providing fast cutting and extended service life. Time Saving: The spool design reduces air resistance for more efficient cutting, allowing you to reach hard-to-access edges of your garden lawn. The aerodynamic shape helps the line stretch and absorb impact on hard surfaces, reducing resistance for improved performance. Fits Model: Compatible with PRTA 20-Li C3- IAN 351753, PRTA 20-Li C3- IAN 365589, PRTA 20-Li C3- IAN 385583, PRTA 20-Li C3- IAN 402319, PRTA 20-Li A1- IAN 311046, PRTA 20-Li B1- IAN 330831, PRTA 20-Li B2- IAN 334231, PRT 300 A1- IAN 360066, PRT 550 A1- IAN 311404, PRT 550 A3- IAN 351652, PRT 550 A3- IAN 330241. Excellent Workmanship: Professionally CNC cut and automatically wound for consistent quality. Safer and more efficient than manual winding, enabling quick and tool-free replacement. Helps reduce strain on the trimmer and prevents line jams during operation. Precautions for Use: Due to strong centrifugal force and fast rotation during use, it is recommended to wear protective eyewear and long pants to avoid injury. This replacement cord is designed for light to moderate weed trimming and is best suited for soft vegetation. For thick or tough weeds, a blade attachment is recommended.