Blade for lawn tractor lawn mower 40" double blade A: 518mm B: 22mm C: 10mm D: 61mm 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 MURRAY Code: R302480 Original Code: 91871HT AT