ISE® Non Genuine Replacement Blade for MTD. Requires 3 for 50' Cut . LENGTH: 17-1/4' WIDTH: 2-1/2' C. H. DIA: 3/8' THICKNESS: 0.2040' DIAMETER OF OUTSIDE HOLES: 5/16' CENTER TO CENTER (OUTSIDE HOLES): 2-1/2' CUT DIRECTION: RIGHT. Replaces Part Numbers: MTD: 742-0171, 742-0171B, 942-0171, 942-0171B. Fits Models: MTD: 190-993-000, 190-993-000, 190-993-000, 190-993-000, 190-993-000 50' Mowing Deck, 195-958-000, 195-993-000, 196-993-000, 19958S, 19993C, 19993S
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