Upper Blade / Honda 72531-vk6-010Pack Size:1Honda 72531-VK6-010, Honda 7869555Dealer Choice 50-3049, J. Thomas BL-102, J. Thomas HD-5104, NHC 212-2514, Oregon 92-102, Rotary 13348, Rotary 14657Honda HRC216 and HXA; 21" deckLength: 20 7/8 ", Center Hole: 1 1/4 ", Outer Hole: 1/2 ", Center To Center: 3 3/8 ", Width: 2 3/4 ", Honda code 8504896, Thickness: .134 "