Specification Brand : echosari BulletPoint1 : Genuine Echo Trimmer Head BulletPoint2 : Reloads in seconds BulletPoint3 : Tap-to-advance line feed BulletPoint4 : Pre-loaded with .095 in. dia. Black Diamond trimmer line BulletPoint5 : compatible with models: SRM-3020, SRM-3020T, SRM-3020U, SRM-410X and more Color : Black ExternallyAssignedProductIdentifier1 : 0724901379088 ExternallyAssignedProductIdentifier2 : 724901379088 IsAssemblyRequired : 1 ItemName : echosari Echo 78890-21050 Speed Feed 500 String Trimmer Head ItemPackageDimensions_Height : 22.9108 centimeters ItemPackageDimensions_Length : 7.112 centimeters ItemPackageDimensions_Width : 15.0876 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : string-trimmer-replacement-parts ItemTypeName : Trimmer Head Manufacturer : Echo Material : Plastic ModelName : Speed Feed 500 ModelNumber : 78890-21050 NumberOfItems : 4 PartNumber : 78890-21050 PowerSourceType : gas_powered ProductDescription : The Speed-Feed 500 is the fastest loading professional bump-to-advance style head in the market. It can be reloaded without disassembly in 30 seconds or less. It features a 40' holding capacity and is pre-loaded with .095'' Black Diamond trimmer line. The Bump-to-Advance has been improved on the Speed-Feed 500 making it easier for the end-user to remain productive throughout the trimming task. compatible with models: SRM-3020, SRM-3020T, SRM-3020U, SRM-410X and more. Size : Medium Style : fashion SupplierDeclaredDgHzRegulation : not_applicable Voltage : 758 volts