Dimensions and Specifications: Length: 17-1/2″ Width: 2-1/4″ Center Hole Diameter: 5/8″ Thickness: 0.1870″ Made in the USA Replaces OEM Part Number: 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 blade for a healthier lawn Vertical teeth improve cutting efficiency Premium grade, high carbon steel for better performance and extended blade life 50% more airflow at discharge Centrifugal Air Lift design provides fast and uniform distribution of clippings Tested for safety, efficiency and quality including Rockwell Hardness Standards ISO 9000 certification guarantee rigid quality standard in all areas of blade manufacturing