Check the listing for details. 99944200903 GENUINE ECHO Speed-Feed 500 Fast Loading Bump Trimmer Head. Condition: New. Listed at 39.99 USD. For sale today is ..... Speed-Feed SPEED FEED 500 Fast Loading Bump Trimmer Head for ECHO SRM Trimmers 99944200903MAY SHIP WITH BLUE STRING!! THESE ARE GENUINE ECHO!! (If you purchase this head and cannot get it installed here is a link to a video explaining how) How to Replace Your ECHO Head This item fits most Echo SRM straight shaft trimmer models!! Recommended for machines with over 25cc's. If you have a SRM-230 or SRM-225, please buy the Speed Feed 400!! If you are not sure, please call!!! I cannot be responsible if you don't purchase the one that you like. This model holds approximately 20' of .095" diameter trimmer line, and accepts line sizes up to .130" it comes pre-loaded with .095" CrossFire line, with the included instructions and adapters This is an in stock item and we will ship it the next day We are a certified ECHO dealership!! Our main priority is to get you a good part with fast shipping and good communication. We value our feedback. It is how we represent ourselves on Ebay. If you wish to return the item you purchased, you will be responsible for the shipping cost to send it back to us. When we receive the returned product, we will credit your account the full purchase price less the actual shipping cost. If you'd like to exchange an item that you purchased, you will be responsible for the cost difference and the shipping cost for the new product. Thank you!