Medium-Lift Blade / Ariens 01137000Pack Size:1Ariens 01128500, Ariens 01137000, Ariens 01137059, Ariens 01137051, Ariens 1137059, Ariens 11285, Ariens 11370, Ariens 01120300, Ariens 01182400, Gravely 01137000, Gravely 01137051, Husqvarna 506 00 00-03, Scotts 01137000Aladdin UA12, Aladdin UGAT15, Dealer Choice 50-2780, Edgewater 150345, ESF 114-080, Foley/Belsaw 5979600, Foley/PLP 114-080, Green Line 34122, Green Meadow UA21, Laser L1701, Laser 91178, Mow More AR20, NHC 212-0007, Oregon 91-005, Prime Line 7-04995, Ratio Parts 22-123, Rotary 3322, Rotary 15-3322, Sunbelt AR-1020, Sunbelt SB-3322, Sunbelt B1AR1020Ariens 911000 Zone Start; Gravely Pro 21SCH; Scotts 21" deckLength: 20 1/2 ", Center Hole: 3/8 ", Width: 2 3/4 ", Thickness: .134 "