Toro Genuine OEM 3-Pack of 138-8888-03 High Flow Blades for 48in Proline Commercial Walk-Behind Mowers 44423 44424 44424TE 44448

What It Is

This is a Toro Genuine OEM 3-pack of 138-8888-03 high flow blades designed specifically for 48-inch Proline commercial walk-behind mowers. These blades are built for high-lift, high-volume grass discharge in heavy-duty commercial cutting conditions.

Fitment & Compatibility

Before buying, verify these exact model numbers: Toro Proline 44423, 44424, 44424TE, and 44448. The deck must be 48 inches wide. These are OEM blades, not aftermarket, so they match factory specs exactly. Check that your mower uses a three-blade spindle configuration—each blade measures approximately 18 inches long with a 1-inch center hole and a 0.210-inch thickness. Do not use on 52-inch or 60-inch decks, or on non-Proline models.

Key Things to Know

• Quality: Genuine Toro OEM steel is heat-treated for durability and resists bending or dulling faster than generic blades. Expect longer life under daily commercial use.
• Installation: Simple bolt-on replacement—remove the old blade, clean the spindle, and torque the bolt to 70-80 ft-lbs. No special tools beyond a wrench or socket.
• Gotcha: These are high-flow blades, meaning they create more lift and clippings discharge. If your mower has a mulching kit or you prefer bagging, these may throw clippings too far or leave windrows. Not ideal for wet grass—clogging risk increases.
• Pack size: You get three blades in one pack, enough for a full deck replacement. Buying individually costs more per blade.

Should You Buy It

Buy this if you own one of the listed 48-inch Toro Proline models and need reliable, high-lift OEM blades for commercial mowing. It’s the right choice for daily cutting of tall or thick grass where discharge performance matters. Skip it if you mulch or bag frequently—you’ll want a different blade profile.