Specification Brand : BOQNZN BulletPoint1 : Pre-installed Design: This idler pulley is pre-installed with bearings, eliminating the need for additional tools or steps for installation. This not only makes the installation process more convenient but also eliminates concerns about incorrect installation or applying excessive force that could damage the pulley. It enhances the success rate of installation and the reliability of the pulley BulletPoint2 : Dust-resistant and Durable: The pulley has high-quality steel bearings for strength and rigidity, ensuring a longer lifespan. The lawn mower belt is made of premium EPDM rubber, offering excellent elasticity and resilience to withstand friction and wear. It is resistant to deformation and breakage even during high-speed rotation and frequent use. With two dust covers, which is protected from dust entering the bearings, enhancing its durability BulletPoint3 : Balance and Vibration Reduction: The well-designed pulley ensures the balance during the rotation of the lawnmower, minimizing unnecessary vibration and noise transmission. This results in smoother operation of the lawnmower, providing a more comfortable user experience while reducing disturbance to the surrounding BulletPoint4 : Wide Compatibility: Fits for specific 30 IN Toro TimeMaster Lawn Mower models and Exmark Commercial. Fits for Toro 20199 / 20200 / 21199 / 21200 TimeMaster 30in, 20975 / 20976 / 20977 / 20978 TimeMaster 76cm, 21199HD TimeMaster 30in Home Depot Rental, 22200 30in TurfMaster Walk-Behind, 22205TE 76cm TurfMaster Walk-Behind. Fits for Exmark ECKA30 Commercial 30, ECS180CKA30000 BulletPoint5 : Low Resistance and High Efficiency: The pulley has been optimized in terms of structure, reducing friction and resistance between the pulley and the lawnmower's transmission system. This minimizes wear and damage to components, resulting in more efficient power transmission Color : 1 Pack CompatibleWithVehicleType : Lawn Mower ExternallyAssignedProductIdentifier1 : 768472317667 ExternallyAssignedProductIdentifier2 : 0768472317667 Hazmat : 9 IncludedComponents : Unit^Instruction Guide ItemName : Pre-Installed Bearings 131-4529 Idler Pulley and 120-3335 Mower Belt Kit Fit for Toro 30" Timemaster Exmark Lawn Mower, Pulley Replace 121-5765 131-4509 125-2532 ItemPackageDimensions_Height : 15.7988 centimeters ItemPackageDimensions_Length : 9.398 centimeters ItemPackageDimensions_Width : 10.8966 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : lawn-mower-pulleys Manufacturer : BOQNZN Material : Stainless Steel ModelNumber : 120-3335 NumberOfBoxes : 1 NumberOfItems : 1 PackageLevel : unit PartNumber : IPKZX0609121-5765 ProductDescription : The metal pulley set is used as an idler pulley. This item attaches to the deck and is used to guide the direction that the belt travels