Oregon 396-732 Gator G6 Blade, 16-5/8" Center hole: 13/16" Do not use with mulching kit installed Gator Mulcher provides cleaner, more efficient cutting performance can eliminate the need to bag, saving time and hassle. Tungsten carbide is fused into the blade  creating an ultra-hard layer at the cutting edge and increasing the time between sharpening Greater width and thickness extends blade life and allows for longer lifting arch to improve bagging and mulching