Dimensions & Specs: Length: 17-1/2″ Width: 2-1/4″ Center Hole Diameter: 5/8″ Thickness: .1870″ Made in the USA Replaces OEM Part Numbers: 110-6837-03, 112-9759, 112-9759-03 Fits Models: Time Cutter Z requires 3 blades for 50″ deck Lawnboy: 81271: Z5000, 3 for 50″, 74370, 74372, 74373, 74374, 74375, 74376 The Copperhead Advantage Sharper blades for a healthier lawn Vertical tines improve cutting efficiency High-quality, high-carbon steel for better performance and longer blade life 50% more airflow at ejection Air Lift centrifugal design ensures fast and even distribution of grass clippings Tested for safety, efficiency and quality, including ISO 9000 Rockwell hardness certification, ensuring a strict standard of quality in all areas of blade manufacturing