Blade for lawn tractor mower mower GT1000 SERIES 100 600 900 RZT54 A: 470mm B: 6 points C: 8mm D: 63.5mm E: 5mm F: 76mm A: diagonal blade length B: centre hole dia. C: positioning hole dia. D: positioning hole dia. E: blade thickness F: blade width MTD Code: R303964 Original code: 7420679 9420679 AT