You can trust that the Oregon 91-242 Lawn Mower Replacement Blade is the best in the industry. Our 26 quality standards ensure you are buying a sharp, high-performance blade that is installed correctly. This ensures a cleaner cut for quality results. DETAILS Center Hole: 5/8″ Requires 2 blades to cut 32″ and 34″ Requires 3 blades to cut 50″ Improved mulching for efficient collection and discharge Stays sharp and durable longer Replaces premier brand: Gravely SPECIFICATIONS Color Black Volume 246.791 in3 Product Unit Each Weight (with packaging) 1.842 lbs Product Height 0.203 Product Length 17″ Product Width 2 Blade Width 2.00″ Blade Thickness 0.203″ Blade Length 17″ Center Hole Size 5/8″ Offset 5/16″ Air Lift 1-1/8″