John Deere GC00344 Standard Lawn Mower Blade is crafted with a unique combination of carbon and boron, delivering exceptional hardness for extended life and a consistently sharp edge without breakage. This blade undergoes rigorous testing by John Deere to ensure superior wear resistance and durability, making it a reliable choice for maintaining your lawn. As a John Deere equipment manufacturer (OEM) part, it s compatibility and quality. Designed specifically for 21" deck models JS63, JS63E, and JS63C, this blade is an i to keep your mower performing at its . For assistance in finding the right John Deere part or accessory, dedicated specialists are available Monday through Friday, 8:00 AM to 5:00 PM EST, via phone or email. Hartville Hardware strives to provide accurate part recommendations sourced from reliable systems, though compatibility may change without notice, so contacting Customer Support is advised if you have any doubts. Model Number: GC00344