Blade Width – 2.50. Thickness – 0.203. Blade Length – 14-1/4. Center Hole Size – 5/8. Air Lift – 1. Blade Length – 20-1/4. FITS THE FOLLOWING MODELS. Z-Series – 34B18Z, 34K15Z, 34K350Z. Fuzion – F34K20, F34B18, F34B24, F34K15. REPLACES THE FOLLOWING BLADES. 91-265 – 423014, 423029, 423173, 423210. 91-259 – 603035, 603055, 603056, 604035.