Echo Original Equipment 10 in. 3 Cutter Metal Blade (20 mm) - 99944200047 Best for clearing and cutting thick grasses and dense weeds For ECHO straight shaft SRM series trimmers and brush cutters Ideal for professionals, commercial landscapers and homeowners The ECHO 10 in. 3-Tooth Grass Blade cuts through heavy overgrown grass. The 10 in. diameter blade is made from heavy-gauge steel and features 3 blades for an aggressive cutting surface. Great for tough grasses where a string head just won't cut it. Use on tough tall grasses Ideal for use in heavy overgrown areas Heavy-gauge steel construction resists corrosion and twisting 20 mm arbor This is an OEM Echo product.