Specification Brand : Trimmers Parts ItemName : Trimmers Parts 3 (Three) Genuine Echo X472000031 Lids/Caps for Speed Feed 450 Head Cap Drum ItemPackageDimensions_Height : 14.6 centimeters ItemPackageDimensions_Length : 9.1 centimeters ItemPackageDimensions_Width : 12.9 centimeters ItemTypeKeyword : string-trimmers ProductDescription : 3 Pack of Lids / Caps for Speed Feed 450 (This is for the lids / caps only!! The actual head is not included!!) Part # X472000031 The Speed-Feed trimmer head is the fastest loading bump-to-advance style head on the market. In fact, it can be reloaded without disassembly in 30 seconds or less - there is no need to press in stiff tabs or unlock covers just to re-load line — please click on the picture below to watch the video. Speed-Feed is perfectly balanced for vibration-free operation. Its smooth cover design glides while trimming. It comes pre-loaded with .095" diameter Cross-Fire line depending on the model. The Speed-Feed fits most straight shaft trimmers and brushcutters manufactured by the biggest names in the industry including ECHO, Shindaiwa, and other major brands. ProductSiteLaunchDate : 2018-02-22T08:00:00.000Z Style : Modern