Blade for lawn tractor mower mowers since 1999 for 42" two-blade deck A: 540mm B: 6 points C: 8mm D: 64mm E: 4mm F: 70mm A: diagonal blade length B: centre hole dia. C: positioning hole dia. D: positioning hole dia. E: blade thickness F: blade width MTD Code: R302604 Original code: 9420616 7420616 AT