Blade for lawn tractor mower mower 38 to 42" to be mounted with mulching A: 315mm B: 38mm C: 11mm D: 64mm E: 3.5mm F: 40mm A: diagonal blade length B: centre hole dia. C: positioning hole dia. D: positioning hole dia. E: blade thickness F: blade width MTD Code: R302609 Original code: 9420539 7420539 AT