Mulching Blade / Exmark 109-5396-SPack Size:1Exmark 103-8107, Exmark 103-8107-S, Exmark 109-5396-SJ. Thomas 103-8107, J. Thomas BL-0027, NHC 212-0463, Rotary 11783Exmark Lazer Z Triton deck; requires 3 for a 60" deckLength: 20 3/4 ", Center Hole: 15/16 ", Width: 3 ", Thickness: .203 "