Specification 1, Upgraded from OEM specification. 2. Durable construction and longer service life. 3. Direct replacement and easy to install. 4. Please verify OEM number before bidding. 5. Features: 1.0″ Crankshaft Only, 6.00″ Pulley, CCW Rotation, 5/8″ Belt, 125 ft-lbs Torque. Description 1. High temperature bearings with high temperature grease can withstand high temperatures and vibration, providing long service life. 2. Machined billet pulley for stronger, quieter and smoother operation, extending belt life and increasing blade speed. 3. Standard friction material provides optimum high torque and long service life. 4. Stainless steel breakaway rivets and anti-backlash hardware. Consistent torque and engagement time throughout the service life. Compatibility: For ZOOM 1634 1840 2040 2150 2350 2450 For ZT 1634 1734 1840 2040 2250 2350 2450 2550 HVZ1840 Replaces OEM Part Numbers: Warner:5219-164, 5219-135, 5219-136, 5219-137, 5219-77, 5219-171, 5219-170, 5219-107, 5219-159, 5219-158, 5219-177, 5219-164 ARIENS00480600 GRAVELY00480600 XTREMEX0127X0127-K, X0337X0337-K, X0338X0338-K, X0502, X0339X0339-K, X0545, X0377X0377-K, X0557, X0718, X0585, X0331, X0722, X0726, X0732, X0736, X0741 Toro112-6044, 127-3410, 119-8941 Cub Cadet717-05123, 717-05123A, 917-05123, 917-05123A, 717-05000, 917-05000, 917-05188, 917-05209, 917-05192 MTD717-05123, 717-05123A, 917-05123, 917-05123A, 717-05000, 917-05000, 917-05188 Troy-Bilt: 717-05123, 717-05123A, 917-05123, 917-05123A Exmark: 127-3410 Craftsman: 917-05188 Hustler: 604713K Kit includes 1 x PTO Clutch 1 x Spacer 1 x Wiring harness 1 x User manual