Replaces Bobcat 42180B, Bobcat WM142180B, Great Dane D18036, Lastec P-128, Lesco 51532, Giant Vac 21538Description: 21" Standard Replacement Blade Requires 3 for 61" cut Heavy DutyLength: 21"Center Hole: 5/8"Center to Center: 1-5/8"Outer Hole: 1/4"Width/Thickness: 250-250