Oregon 91-400 blade John Deere M84472

Technical Specifications
Blade Length: 19-1/2 inches (measured diagonally from tip to tip)
Blade Width: 3 inches
Blade Thickness: 0.203 inches
Center Hole: 11/16 inch round hole (interchangeable with some star-shaped center mounts)
Deck Requirement: Requires 2 blades for a 38-inch cutting deck
Material: Thru-hardened steel with a Rockwell C-scale hardness of 50 for durability and safety