OEM PTO Clutch replacement for John Deere part number TCA24446 and TCA22416.  The model fitment below is straight from John Deere - Please understand, depending on the deck size or serial number of your mower, your mower could use a different clutch.  You need to reference a diagram for your specific mower and match part numbers to verify proper fitment.  If you are not sure how to do this, please email us your model number, and we'll do it for you.   Fits John Deere Models: Z915E ZTrak™ (60" Models Only) Z915B (60" Models Only) Z920M ZTrak™ (S/N 030001 & Above) Z930M ZTrak™ (54" Deck Models Only With S/N 030001 & Above) Z945M EFI ZTrak™  Z920R Z925M (54" S/N 030001 & Above) Z925M (60" S/N 030001 & Above) Z930R Z945M Specs: Bore (ID): 1.125" Pulley/Flange (OD): 6.62" Rated Torque: 200 lb-ft Mounting: Standard Rotation: CCW This is an authentic Warner Electric PTO clutch 5218-338.  Rotary Item # 17271.