9" x 36 Teeth Carbide Tipped Brush Cutter Blades: Out Diameter: 230mm/9inch, Arbor Bore Size: 25.4mm/1inch, Blade Teeth: 36T. It fits straight shaft gas trimmer with 1 or 0.79 inch gear case, also suitable for 20mm/0.79inch with attached washer. Our weed eater is ideal designed for fast and easy cutting of small trees, heavy brush, thick weeds and grass. Our trimmer blades not only work for removing grass, trimming lawn, but also used for cutting woods and trees. Fit most of the gas or electric trimmers. The product is applicable for Husqvarna, Stihl, Oregon, and Hitachi models, like Stihl 55, fs 55r, fs 56, fs 56rc, fs56 rc-e, fs 66, fs 70r, fs 76, fs 85, fs 90, fs 90r, fs 91, fs 91r, fs110, fsx110, fs111, fs 130R, fs131, fs 240, fs-km, 4mix; Husqvarna 128, 128L, 128LD, 224L, 324L, 322L, 323L. Carbide tipped blade is estimated to last about 10 times longer than plain steelMade by CE certified Manufacturer.Which keeps teeth tough and durable. Easy to use and install, suitable for your garden or for agricultural purposes. Easy to Install: This weed eater blades is easy to install on the trimmer with the blade adapter kit. The installation is tight and there is almost no vibration. Compatible for Stihl 55, fs 55r, fs 56, fs 56rc, fs56 rc-e, fs 66, fs 70r, fs 76, fs 85, fs 90, fs 90r, fs 91, fs 91r, fs110, fsx110, fs 130R, fs131, fs 240, fs-km, 4mix; Husqva 128, 128L, 128LD, 224L, 324L, 323L.