Blade for lawn tractor mower mower 450 FOR 30" PLATE A: 760mm B: 6 points C: 8mm D: 64mm E: 4mm F: 70mm A: Diagonal blade length B: Centre hole dia. C: Centre hole dia. D: Centre hole dia. D: Centre hole dia. E: Blade thickness F: Blade width MTD Code: R302663 Original Code: 9420609 7420609 AT