Specification Brand : Kaberalty BulletPoint1 : Ego 3660582001 Compression Spring Compatible with Ego ST1500, ST1500-S, ST1500F, ST1500SF, ST1500XY, ST1510S, ST1510T, ST1520, ST1520S, ST1530 and STA1500 15" String Trimmers BulletPoint2 : Ego 3660582001 Replacement Compression Spring Compatible with Ego AH1300, AH1520, AH1522, AH1530 & AH1531 Trimmer Heads BulletPoint3 : IMPORTANT NOTE: Older versions of ST1500F or ST1500SF Trimmers may have the AH1500 trimmer head which uses a different spring. If your trimmer head has green lines that must line up to put line into the head, then your trimmer head is model AH1500 and you need part Number 3660650001 BulletPoint4 : Ego ST1500 replacement spring has good elasticity, even if it works for a long time, it can restore its original appearance, ensuring your long-term use BulletPoint5 : You will get 4 Pack Ego 3660582001 Spring,Pls contact us first when you get some problem, we will offer you assistance asap Color : Black CompatibleMaterial : Wood ControllerType : Mechanical knob or Push Button ControlMethod : touch CustomerPackageType : Standard Packaging CuttingWidth : 0.09 inches ExternallyAssignedProductIdentifier1 : 717016452067 ExternallyAssignedProductIdentifier2 : 0717016452067 ExternallyAssignedProductIdentifier3 : 0865459000113 ExternallyAssignedProductIdentifier4 : 0617724916731 ExternallyAssignedProductIdentifier5 : 00865459000113 GpsrSafetyAttestation : 1 IncludedComponents : appliance-replacement-parts IsAssemblyRequired : 1 ItemDisplayDimensions_Height : 0.5 inches ItemDisplayWeight : 0.13 pounds ItemName : Kaberalty 3660582001 Trimmer Head Compression Spring Compatible with Ego ST1500, ST1500-S, ST1500F, ST1500SF, ST1500XY, ST1510S, ST1510T, ST1520, ST1520S, ST1530 and STA1500 15" String Trimmers ItemPackageDimensions_Height : 6.2992 centimeters ItemPackageDimensions_Length : 2.794 centimeters ItemPackageDimensions_Width : 3.9878 centimeters ItemPackageQuantity : 1 ItemShape : Rectangular ItemTypeKeyword : string-trimmer-replacement-parts Manufacturer : Kaberalty Material : Plastic ModelName : Ego Trimmer Spring ModelNumber : Ego 3660582001 MountingType : Wall Mount NumberOfBoxes : 4 NumberOfItems : 60 NumberOfTeeth : 32 PartNumber : ST1500-S PowerSourceType : manual ProductDescription : 3660582001 Trimmer Head Compression Spring Compatible with Ego ST1500, ST1500-S, ST1500F, ST1500SF, ST1500XY, ST1510S, ST1510T, ST1520, ST1520S, ST1530 and STA1500 15" String Trimmers (4 Pack) ProductSiteLaunchDate : 2017-01-12T08:00:00.000Z SafetyWarning : Always wear appropriate safety gear, including eye protection and sturdy gloves, when handling and installing this replacement part. Be aware of potential flying debris or cut hazards when operating a string trimmer. Always follow the manufacturer's instructions for proper installation and usage. Style : Compact SupplierDeclaredDgHzRegulation : not_applicable SupplierDeclaredHasProductIdentifierExemption : 1 TemperatureControlType : manual UnitCount : 60 UnspscCode : 27112700 Voltage1 : 110 volts Voltage2 : 220 volts