Replace part numbers: The lawnmower blade set replaces part numbers 08720-VR8-M00 (set), Top Blade: 72531-VR8-M00, and Bottom Blade: 72511-VR8-M00. Compatible with the following 21-Inch Deck Push and Propelled Mower: The 72531-VR8-M00 & 72511-VR8-M00 Replacement Blade Set is designed to be perfectly compatible with Hon da lawn mower models HRN216PKA, HRN216PKAA, HRN216VKA, HRN216VKAA, HRN216VLA, HRN216VLAA, HRN216VYA, HRN216VYAA. For Deck Size 21 inches Blade Mulching Blade Upper Blade (72511-VR8-M00) Length: 20.9" Width: 2.52" Thickness: 0.12" Center Hole: 1.25" Center to Center: 3.38" Outer Hole: 0.41" For Deck Size: 21 inches Bottom Blade (72531-VR8-M00) Length: 21" Width: 2.49" Thickness: 0.12" Center Hole: 0.83" Center to Center: 3.4" Outer Hole: 0.42"