Tap here to read more about Caltric AM141040 M112991 M154158 AM137325 Spindle Blade for John Deere. Premium Quality Replacement Part. Compatible with Toro Models. Compatible with Exmark Models. QST20BE422 SN: 790,000. QST22BE482 SN: 670,000 – 719,999. QST22BE482 SN: 720,000 – 849,999. QST23KC482 SN: 720,000 – 789,999. QST23KC522 SN: 670,000 – 789,999. QST24BE522 SN: 720,000 – 849,999. Width : 32.8 mm – 1.29 in. Inner Diameter : 16.8 mm – 0.66 in. Outer Diameter : 120.7 mm – 4.75 in.