Maxpower's 331730S includes 1-mulching blade for 20 in. Craftsman, Husqvarna and Poulan mowers. This blade replaces OEM numbers 145106, 532145106, 752233 and PP22055. It measures 20 in. L x 2-1/4 in. W and features a 5/8 in. center hole. Commercial mulching blades feature 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 blades are proudly manufactured to meet or exceed OEM specifications.