Blade for lawn tractor lawn mower M400 M500 M510C B560C K670C 675C L670C A 8 BLADES WITH 30" PLATE A: 247mm B: 21mm C: 6.5/8mm D: 58mm E: 3.5mm F: 66mm A: diagonal blade length B: centre hole dia. C: centre hole dia. D: distance between centre holes D: distance between centre holes E: blade thickness F: blade width MTD Code: R301688 Original Code: 7420495 AT