The MaxPower Universal Gold Metal Mulching Blade for 21 in. Cut Mower includes (1) universal gold metal commercial mulching blade for 21 in. cut mowers. This mulching blade measures 21 in. L x 2-1/2 in. W with a 1 in. center hole. It includes a cover washer and 6 reducing washers in the following sizes: 3/8 in., 7/16 in., 9/16 in., 1/2 in., 5/8 in. and 3/16 in. The commercial mulching blade features a greater cutting surface for increased mulching performance, sharpened cutting teeth for a precision cut and a centrifugal air lift design for uniform chopping distribution. MaxPower mower blades are all made from quality US steel and are manufactured to meet or exceed OEM specifications.