Oregon 396-704 PK3 Gator Mulcher G6 Blades 17-7/8" Pack of 3 Replaces: Dixie Chopper 30227-52T, 30227-52X; Replaces Hustler 603848, 603848X, 783753X, 782532, 783753Y, 785436Y, 787721, 787721X, 787721Y, 794198, 794198X ,794198Y, 795526, 795526X, 795526Y, 603995, 785436X, 603995X, 603848Y, 785436, 783753 Length: 17-7/8"; Width: 3.00"; Thickness: 0.250"; Center hole size: 5/8"; Air Lift: 1" Tungsten carbide is fused into the blade  creating an ultra-hard layer at the cutting edge and increasing the time between sharpening