Premium Material: The trimmer replacement cord is made of high-quality raw materials. The ABS spool is sturdy, 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, helping you reach hard-to-access edges of your garden lawn. The aerodynamic shape allows the line to stretch and absorb shock 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 manufactured using CNC cutting and automatic winding for consistent quality. Safer and more time-efficient than manual winding. Quick and tool-free replacement helps reduce strain on the trimmer and prevents jamming during operation. Precautions for Use: Due to strong centrifugal force and fast rotation during use, it is recommended to wear protective glasses and long pants to avoid injury. This replacement cord is designed for light-duty trimming and soft weeds only. For thick or tough weeds, a blade attachment is recommended.