Blade for lawn tractor lawnmower mower series 080 for 20" deck A: 510mm B: 21mm C: 10mm D: 64mm E: 3mm F: 57mm 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: R302613 Original code: 9420500 7420500 AT