Compatibility: Lawn Mower Blade for Greenworks 20-inch and 21-inch corded mowers, specifically models 25022 and 25112. Product Accurate Specifications LENGTH:19.69" WIDTH:1.97" THICKNESS:0.71" There are many similar styles of lawn mower blades with this interface, please check your lawn mower blade model number (this lawn mower blade model number is 33313250), if your lawn mower blade model number has worn out and disappeared, please double-check our size chart to avoid purchasing the wrong item. The construction of one-piece steel will make sure that the blades are sturdy ,which are not easy to wear and tear,cut the grass more efficiency, keep the lawn clean and tidy Package Included:1 * 33313250 Lawn Mower Blade fit corded Mowers 25022, 251122