Mulching Blade / Exmark 103-6391-SPack Size:1Exmark 103-6391-s, Exmark 103-6391-s, Exmark 103-6391J. Thomas 355184, Oregon 92-026, Rotary 11240Exmark Lazer Z CT, Lazer Z HP, Metro HP, Next Lazer ASX, Next Lazer Z, Next Lazer Z AS, Quest, Turf Tracer HP and Vantage; requires 3 for 48" deckLength: 16 1/4 ", Center Hole: 15/16 ", Width: 2 1/2 ", Thickness: .203 "