QualityParts From Oregon That you can depend on. Requires 2 blades for 42" cut: 100 Series Blades formed with double bevel technology for extended cutting edge and reduced blade noise; Works in sandy environment; Major brand replacement: AYP; Replaces OEM No. 532131323; High-lift: Aggressive blade angle increases air flow to push debris up and out for superior bagging or side discharge; Oregon Equipment Parts 195-048 BLADE,AYP 21 IN