A quality non genuine lawnmower blade to fit all HRB423 models. Please compare your old blade with the one shown in the picture and check the dimensions with those shown below to ensure this is the correct blade for your lawnmower as more than one type may have been fitted. Dimensions: Length = 420mm, Inside Diameter = 27mm, Outer Hole Centre To Centre = 95mm Similar To Part No's: 72511 VA9 H50, 72511-VA9-B50
