21" Honda HRX217 Lower Lawn Mower Blade 72511-VH7-000 - Used with our 6430-HO Upper Blade - Fits 2010 and Newer Honda HRX217 Walk Behind Mowers - Specs: Length: 21" - Width: 4-1/4" - C. H. Dia: 0.8040" - Outside Diameter: 0.4150" - Center To Center: 3.3730" Replaces 725...