Suitable for models: compatible with coil model 3405685. Fits Einhell GC-ET 4530, Gardenline Aldi GLR 450, 451, 452, 453, 454, 455, 456, 457, 458, 459, GLR 450/1, 4550/1, 450/2, 450/3, 450/4, 450/5, GLT 453, 454, 455. Compatible with King Craft KCR 450, KCR 451, KCR 500, KCR 500 GB. Fits Top Craft TCR 50, TCR 450, TCR 451, TCR 500. Suitable for Einhell RTV 40, RTV 5500, RTV 550/1. Also fits Performance Power PWR400DGTA, PWR550GT. Durable material: high-quality automatic ABS feed trimmer spool with durable nylon thread made of copolymer in helix design, offering flexibility and long-lasting performance. Coil specifications: 2 x 5 m nylon copolymer resin line in spiral design. Synthetic trimmer and edge cutting line with a 1.6 mm diameter cord for efficient cutting and extended service life. Easy to use: simplifies the process of replacing trimmer line. Easy installation—remove the old spool and replace it with the new one for quick setup. Precautions for use: always wear protective glasses and appropriate clothing when operating. Disconnect power before installing, removing, or replacing accessories. This trimmer line is intended for light-duty use on young grass. For heavy weeds, use alternative tools such as blade attachments.