[Replaces OEM Part Number] Replaces 1-603805, 280-866, 603805, E603805, 99-4638 [Compatible with] Idler Pulley Compatible with Toro Z Master & Exmark Lazer Z/Triton Mowers. Fits models include: Z200, Z252, Z252L, Z253, Z255, Z256, Z257, Z283L, Z286E, Z287L, Z288E, Z500, Z528, Z550, Z553, Z555, Z557, Z560, Z587L, Z588E, Z590-D, Z597-D for 52"/60"/62"/72" Decks [Specification and Dimensions] Inner Diameter: 0.67 inches, Outer Diameter: 4.97 inches, Height:1.2 inches. Package included: 1x t oro 1-603805 Pulley, 1x Idler Arm Assembly. Please carefully check the product dimensions and review the provided images [Premium Heavy-Duty Composite] Our 1-603805 Pulley is engineered for superior durability & wear resistance, outperforming standard steel or plastic pulleys in harsh conditions [Smooth & Reliable Power Transmission] Precision-machined sheave groove minimizes belt slippage for optimal efficiency and reduced maintenance 

Replacement Part Number

1-603805, 280-866, 603805, E603805, 99-4638

Universal Compatibility

Compatible with:

Ex mark Ride-On Zero Turn Lazer Z

Ex mark Ride-On Zero Turn Lazer Z Air Cooled

Ex mark Ride-On Zero Turn Lazer Z Air Cooled 604

Ex mark Ride-On Zero Turn Lazer Z AS

Ex mark Ride-On Zero Turn Lazer Z D-Series 60"

Ex mark Ride-On Zero Turn Lazer Z D-Series 72"

Ex mark Ride-On Zero Turn Lazer Z DS-Series 60"

Ex mark Ride-On Zero Turn Lazer Z DS-Series 72"

Ex mark Ride-On Zero Turn Lazer Z Liquid Cooled

Ex mark Ride-On Zero Turn Lazer Z XP

Ex mark Ride-On Zero Turn Lazer Z XS

Ex mark Ride-On Zero Turn Lazer Z XS Diesel

Ex mark Ride-On Zero Turn Lazer Z XS Liquid Cooled

Ex mark Ride-On Zero Turn Turf Ranger

Ex mark Stand-On Mower Vantage 60"

Ex mark Stand-On Mower Vantage S-Series 60"

Ex mark Stand-On Mower Vantage S-Series 60" Propane

Ex mark Stand-On Mower Vantage X-Series 60"

Ex mark Walk Behind Mower Turf Tracer

Ex mark Walk Behind Mower Turf Tracer Hydro

Ex mark Walk Behind Mower Turf Tracer X-Series 52" Hydro ECS

Ex mark Walk Behind Mower Turf Tracer X-Series 52" Propane Hydro ECS

Ex mark Walk Behind Mower Turf Tracer X-Series 60" Hydro ECS

Ex mark Walk Behind Mower Turf Tracer X-Series 60" Hydro ECS Stand-On

Ex mark Walk Behind Mower Turf Tracer X-Series 60" Propane Hydro ECS