Replace For Part Number - The lawn mower blade replaces part number 2105200317, 2105200317A, 84005221. Fits Models - Compatible with for 21Inch Cut Walk Behind Mower[2020]: MNA152901, MNA152903; for 21Inch Walk Behind Mower[2021]: MNA152702, MNA152703; for 20Inch Walk-Behind Mower: MNA152701; for Black Max 21Inch 2-in-1 Gas Push Mower [2021]: MNA152905. Dimension - The package contains 2 mower blade. Length: 21Inch, Width: 2.15Inch. The lawn mower blade comes with an oval center-hole pattern. Please check your part number, compatible model, and blade pattern before your order. High-Quality Material - The mower blades are made of and long-lasting carbon steel material for excellent performance and . Powder coating helps to avoid rust. Extended cutting improves the efficiency of cutting. Improved Lawn Care - By using this replacement blade, the mower's cutting ability and engine performance is maintained, the lawn is neatly trimmed, the equipment runs efficiently, and ultimately the overall lawn care experience is enhanced. Colour:Black Material:Metal Package Contents: 2 * lawn mower blade Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.