Toro OEM 138 8889 03 HI-FLO Mower Deck Blade was created for the purpose of giving a little extra lift to that damp heavy grass that seems to want to fall short of your discharge chute. The OEM 138 8889 03 HI Lift Mower Blades have an added lip that increases air volume and promotes air circulation in your deck, resulting in a cleaner mowing experience without clumps. This feature varies in effectiveness depending on the type of grass you have. Designed to meet OEM specifications this Mower Deck Blade is compatible only with the Proline series (MODEL 44427 and 44454) with a 54" deck. Please Refer to the Special Notes, References and The Model Fit Chart below to ensure a proper fit. Click on the Part Numbers to be redirected. NOTE: The Toro 138-8889-03 does require the Round Shaft/Blade Arbor Assembly with the Stand-Alone bolt and removable Belleville Washer. Refer to the image above for an accurate Comparision. THE 138-8889-03 HI-FLO MOWER DECK BLADES AR DESIGNED ONLY TO BE USED ON 54" PROLINE MODELS 44427, and 44454 AND ARE NOT RECOMMENDED FOR OTHER 54" MOWER DECKS. Refer to the notes bellow and click on the appropriate part number to be redirected. COMPATIBLE BLADE REFERENCES 138-8892-03 - HI-Flow/Bagger Blade 138-8885-03 - Mulching/Recycler Blade COMPATIBLE PART REFERENCES 51-4060 - Blade Bolt 125-1736 - Removable Belleville Washer 139-2357 - Spindle Assembly/Round shaft (Click on part number to view associated parts) Specification Product Number: 138888903 Brand: Toro Length: 18.500 IN (46.990 CM) Width: 2.250 IN (5.715 CM) Height: 1.125 IN (2.858 CM) Weight: 2.178 LB (0.988 KG) Model Fit: 44427, 44454