Troy Bilt Chipper Blade Knife for Troy-Bilt 1901824 1901823 1908600 1900104 1901303 Part numbers: 1901824, 1901823, 1908600, 1900104, 1901303, W2030905, W2030901, 1901782, 1901782MA Fits models: 47278, 47279, 47282, 47286, 47287 and many more e310401393300