Blade for lawn tractor lawn mower GT53SB SP53S A: 510mm B: 10mm C: 8mm D: 65mm E: 4mm F: 57mm 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 MA.RI.NA SYSTEM Code: R302661 Original code: 53013 AT