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Walk behind mower models: HD45
Fits the following Rotary Cutter Models: 603
SET OF 6 Replacement Blades EXMARK 103-8251 Hardened Made in USA - B1EM1871
Built sandbox tough
16 - CC19989
A&I XHT 17" Mulching Mower Blade (Single) - B1JD1043,1 Sections Walk behind mower models: HD45A&I XHT 17" Mulching Mower Blade (Single) B1JD1043,1 Replacement XHT Lawnmower blade. XHT(Xtreme Hardness & Toughness) blades are 25 40% harder than standard lawnmower blades. Benefits of the HXT blade are sharper and longer lasting cutting edges. More resistance to bending. Tighter tolerances in the aftermarket vs. OEM. XHT blades also offer greater impact toughness. (3) blades for 48" cut. Fits 48C decks since 1999. Center Hole 51 64" Length 17"