Genuine Atom Lawn Edger Blade Set 5 GENUINE PACKS FOR THIS PRICE Fits all Petrol Models. ATOM PETROL LAWN EDGER BLADE SET RED & GREEN MODELS GENUINE 43105 43089 Genuine In Packet2 x Cross System Length 267mm Width 48mm Hole Diameter 12mm The blade part number 43105 (which is also listed as 43089) is the standard "cross-blade" set for almost all Atom Petrol Powered Edgers.It is compatible with virtually every domestic and professional "Red" or "Green" petrol model. The only major exception is the original vintage "Yellow" 301 model, which used a different system.Confirmed Compatible ModelsBelow is the breakdown of the specific model numbers that use this blade set: Category Model Numbers Domestic Models 101, 103, 104, 410, 431, 435, 438, 440, 441, 450, 458, 480, 481, 550, 560, 561 Professional Models 102, 202, 203, 204, 205, 310, 415, 420, 453, 454, 562, 580, 581, 582, 585, 586 Honda-Powered Atom 550 Deluxe (often referred to as the "Honda Atom") Extended Series 20101, 20102, 20103, 20104, 20203, 20204, 20205, 20310, 20410, 20415, 20420, 20431, 20435, 20438, 20440, 20441, 20450, 20453 Blade Specifications If you are verifying a physical blade you already have, it should match these dimensions: Length: 10.5 inches (approx. 267mm – 271mm)Width: 1.87 inches (approx. 47mm – 48mm)Center Hole: 15/32" (12mm)Type: Two-piece cross blade (sold as a set of 2) A Quick Note on "Genuine" vs. "Aftermarket" While many aftermarket blades list these part numbers as a cross-reference, Atom Industries officially warns that using non-genuine blades can void your warranty. They note that third-party blades are often heavier or thicker, which can lead to gear system damage because they don't absorb shock as well as the genuine flexible steel blades.