Blade for lawn tractor mower mower 12HP for 39" deck A: 500mm B: 10mm C: 9.5mm D: 103mm E: 3.5mm F: 52mm A: diagonal blade length B: centre hole dia. C: centre hole dia. D: distance between centres of positioning holes E: blade thickness F: width of blade NOMA Code: R301656 Original Code: 58190 306932 AT