Genuine Factory Part blades are designed and rigorously tested to maximize safety and performance. These blades are the only blades engineered to the original equipment's exact specifications. Manufactured using 10B38 Steel and to a 42 Rockwell Hardness rating， these blades meet American National Standards Institute requirements for safety. To protect your investment， only use Genuine Factory parts blades.Find the MOWER BLADE MULCH 21L at Ace.
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