Replacing OEM numbers: 0000 350 3502,4126 124 0800, 4126 124 0801, which is a direct replacement for the old or broken one. Compatibility: This product is Compatible with STIHL Stihl FS81 FS86. Easy to install: Direct replacement without adjustment, perfect compatibility and high reliability. Product material: This product is specially designed with plastic, sponge and metal materials, with a long service life and not easy to damage. Product list: Product include a total of 1pc Fuel Filter, 1pc Spark Plug, 1pc Black Air Filter,1pc White Air Filter, which can completely meet your daily use needs and replacement., Manufacturer: AS Axis Spindleon