The ECHO 69620088830 Speed-Feed 400 Trimmer Head is a genuine OEM accessory designed for quick and easy line loading on ECHO string trimmers. This durable 2-line head features a rapid-loading system, allowing users to reload trimmer line in seconds without disassembly. It is compatible with trimmer lines of 2.032mm, 2.413mm, 2.667mm, and 3.302mm diameters. The head offers versatile attachment options with arbor hole diameters of 7mm, 8mm, 10mm, and 12mm, and supports 1.25mm left-hand female (LHF) and right-hand female (RHF) thread pitches. It is engineered for efficient cutting and long-lasting performance.