John Deere M77178 Standard Mower Blade is designed for JA and JX Series mowers, as well as other mower models featuring a 21-inch cut. This John Deere equipment manufacturer (OEM) part ensures reliable performance and durability. The blade is crafted with strong materials that prevent stretching and rolling over, providing smooth engagement and consistent power during mowing. It includes one blade and fits a variety of models including 12PB, 12PC, 12SB14PB, 14PZ, 14SB, 14SC, 14SE, 14SX, 14SZJA60, JA62 before serial number 200,000, JA65JE75, and JX75. For assistance in finding the right John Deere part or accessory, John Deere specialists are available Monday through Friday, 8:00 AM to 5:00 PM (EST). Hartville Hardware strives to provide accurate part recommendations sourced from reliable systems, though compatibility may change without notice. Model Number: M77178