Specifications: Color: Black Product Type: Blade Length: 21-1/2 (546.1mm) Centre Hole Dia. 5/8″ (15.87mm) Width: 2-1/4 (56.75mm) Steel Thickness: .164 2 Blades for 42″ Cut Fits: – 71255 XLS420T Lawn Tractor – 74325 Timecutter 16-42Z – 74327 Timecutter Z420 – 74380 Timecutter Z4200 – 74381 Timecutter Z4202 – 74386 Timecutter ZS4200 – 74387 Timecutter ZS5000 – 74389 Timecutter ZS4200S – 74390 Timecutter ZS4200TF – 74420 Timecutter Z420 – 74425 Timecutter Z530 – 74616 Timecutter SS4216 – 74622 Timecutter SS4200 – 74720 Timecutter SS4200 – 74723 Timecutter SS4250 – 74726 Timecutter SS4225 – 74760 Timecutter MX4250 – 74760TA Timecutter MX4250 – 74766 Timecutter MX4200 – 74784 Timecutter SW4200 Replace OEM: 106-2247-03 131-3939-03 Package Include: 2 X blades