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. King Craft: KCR 450, KCR 451, KCR 500, KCR 500 GB. Top Craft: TCR 50, TCR 450, TCR 451, TCR 500. Einhell: RTV 40, RTV 5500, RTV 550/1. Performance Power: PWR400DGTA, PWR550GT. Durable material: high-quality automatic ABS feed trimmer spool and 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 and synthetic trimmer/edge cutting line. The cord with a diameter of 1.6 mm supports efficient cutting and extended service life. Easy to use: simplifies the process of replacing trimmer line. Easy installation—simply remove the old spool and replace it with the new one. Precautions for use: wear protective glasses and long clothing when using this product to avoid injury from flying debris. Disconnect the power source before replacing, installing, or removing accessories. This trimmer line is intended for use on light grass. For tougher weeds, use alternative tools such as blade attachments.