Hipa 165833 7021P 21 Inch Medium Lift Mower Mulching Blade Set for Husqvarna 7021P 5521CHV 21 Inch Deck Walk Behind Mower Zero Turn Lawn Mower Replace 532406712 532189028 Blade Pack of 1

What It Is

This is a 21-inch medium-lift mulching blade set (sold as a pack of 1) designed to replace OEM blades on Husqvarna walk-behind mowers and zero-turn models with a 21-inch deck. It’s ideal for mulching grass clippings into fine particles for lawn fertilization, rather than bagging or side-discharging.

Fitment & Compatibility

Before buying, check your mower’s model number and deck size—this set fits Husqvarna 7021P, 5521CHV, and other 21-inch deck walk-behinds and zero-turns. It replaces OEM part numbers 532406712 and 532189028. Measure your existing blade’s length (center hole to tip) to confirm 21 inches, and verify the center hole diameter (typically 7/8-inch or 1-inch) and the blade’s width (usually 2-3 inches). If you have a different brand deck (e.g., Honda, Toro) or a 20-inch or 22-inch deck, this likely won’t fit. Cross-check your mower’s manual or the stamped blade numbers before ordering.

Key Things to Know

• Quality: Customers report decent steel durability for medium-use residential mowing, but it’s an aftermarket blade—expect slightly less edge retention than OEM Husqvarna blades.
• Installation: Easy swap with a socket wrench; you’ll need to torque the blade bolt to 50-70 ft-lbs. Always disengage the spark plug and tilt the mower with the carburetor side up to avoid oil leaks.
• Gotcha: This is a medium-lift blade—it won’t throw clippings as high as a high-lift bagging blade, so don’t expect great bagging performance. For heavy, wet grass, you may need to overlap passes to avoid clumping.
• Pack size: “Pack of 1” means one blade, not a set of two. If your mower uses two blades (common on zero-turns), you’ll need to buy two packs.

Should You Buy It

Buy this if you have a Husqvarna 21-inch deck walk-behind or zero-turn and want a budget-friendly mulching blade for regular residential lawn care. It’s a solid replacement for worn OEM blades when you don’t need premium edge life or bagging capability. Skip it if you need high-lift blades for bagging or a commercial-duty blade for frequent heavy use.