Blade for lawn tractor mower RIDER 11C 13 13C 13AWD 15C A: 360mm B: 10mm C: 8.3mm D: 40mm E: 4.5mm F: 50mm A: Diagonal blade length B: Centre hole dia. C: Centre hole dia. D: Positioning hole dia. E: Blade thickness F: Blade width HUSQVARNA Code: R303934 Original Code: 505544501 AT