2 Pack of Mulching Blades for John Deere AM137333, GX22151, GY20850 Replaces OEM: John Deere AM137328, AM137333, AM141033, GX22151, GY20850; Husqvarna 578431911 Fits: John Deere 102, 105, 107S, 115, 125, 135, X105, X110, X120, X125, X145, X300, X304, X310 Fits: John Deere LA100, LA105, LA110, LA115, LA120, LA125, LA135, LT160, LT180 Fits: John Deere D100, D105, D110, D120, D125, D130, S240, SST15, SST16 Requires 2 for 42" deck