Suitable for models: compatible with coil models 3405685. Compatible with 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. Compatible with Top Craft TCR 50, TCR 450, TCR 451, TCR 500. Compatible with Einhell RTV 40, RTV 5500, RTV 550/1. Performance Power PWR400DGTA, PWR550GT. Durable material: high-quality automatic ABS feed trimmer spool with durable nylon thread made of copolymer in helix design, flexible and long-lasting. Coil specifications: 2 x 5 m nylon copolymer resin in spiral design, synthetic trimmer and edge cutting line. The portable cord with a diameter of 1.6 mm enables fast cutting and extended service life. Easy to use: simplifies the process of replacing trimmer line. Simple installation—remove the old spool and replace with the new one. Safety instructions: wear protective glasses and long clothing during use to prevent injury from flying debris. Disconnect the power source before replacing, installing, or removing accessories. This trimmer line is intended for use on light grass only; for tougher weeds, use alternative tools such as blade attachments.