Nylon Material: The replacement valve core head for the gasoline lawn mower is made of brand-new nylon material, which features high toughness, good wear resistance, excellent performance, and high strength. We will find suitable replacement parts for your trimmer or lawn mower. Fits 95% of straight shaft trimmers with M10 x 1.25 left-hand thread, brush cutters, and strimmers. Rotation: Counterclockwise. Two-line brush cutter head. Exquisite Workmanship: Extremely good wear resistance and drop resistance, carefully crafted, made of new nylon material. The material is good, does not deform easily, has a long service life, is easy to install, and can be installed without disassembling the blade. Practical: Practical and compact, an excellent accessory for lawn mowers, with stable characteristics and high reliability. Very suitable for use in gardens or agriculture, it has good weed control effects, especially suitable for trimming weeds between shrubs, along edges, walls, and fences.