Blade Width – 3.00. Thickness – 0.250. Blade Length – 21-9/16. Center Hole Size – 13/16. Air Lift – 1. Gator Blade Series – Gator® G6T. The Oregon® Gator® G6T 396-771 blade is enhanced with carbide. This heavy duty blade is designed for commercial applications and built to withstand rough conditions with top performance and longevity. Fused with carbide for added tough cutting exterior. Superior mulching and bagging with blade angle to increase air flow. Greater width and thickness extends blade life. Replacement blade for John Deere: M143504, M158112, M152727. Fits the Following Models. Replaces the Following Blades.