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 access to hard-to-reach areas of your garden lawn. The aerodynamic shape helps the line 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 and safe operation. Enables quick and tool-free replacement, helping reduce wear on the trimmer and preventing line jams during use. Precautions for Use: Due to strong centrifugal force and high-speed operation, it is recommended to wear protective glasses and long pants to avoid injury. This replacement cord is designed for light weed trimming and is best suited for soft vegetation. For thick or tough weeds, a blade attachment is recommended.