Specification Brand : BlueStars BulletPoint1 : IMPORTANT NOTE: Please kindly confirm your engine's model and part numbers before purchasing to guarantee that you receive the correct parts. Thread size: M10*1.25 LEFT BulletPoint2 : PERFECT FIT: Replaces 99944200903, X047000940. Compatible with Echo SRM-266, SRM-266S, SRM-266T, SRM-266U, SRM-280, SRM-280S, SRM-280T String Trimmer. Fits for SRM-266U 25.4cc Straight Shaft Trimmer/Brushcutter; SRM-266S (T42211001001-T42211999999), SRM-266S (T42312001001-T42312999999), SRM-266S (T43313001001-T43313999999) Steel Drive Shaft Trimmer BulletPoint3 : WIDE COMPATIBILITY: Fits for SRM-266T (T42411001001-T42411999999), SRM-266T (T42512001001-T42512999999), SRM-266T (T43413001001-T43413999999) High Torque Trimmer; SRM-266U (T42712001001 - T42712999999), SRM-266U (T43513001001 - T43513999999) Straight Shaft Trimmer / Brushcutter BulletPoint4 : FIX YOUR BROKEN TRIMMER: Our 99944200903 Trimmer Head will fix the most common problems of your trimmer such as stuck trimmer head, the trimmer does not spin, or the threads stripping. These are signs that your trimmer head needs changing and our product is exactly what you need BulletPoint5 : EXTREMELY DURABLE: It is made from hard and sturdy metal and impact-resistant plastic that promises great durability while reducing the risk of breaks or cracks. The material combination is optimized for a prolonged lifetime BulletPoint6 : 100% LIFETIME PROTECTION: Enjoy reliable performance with our lifetime protection, ensuring that your product will always be covered for any defects or issues that may arise. Color : As pictured GpsrSafetyAttestation : 1 ItemName : BlueStars Upgraded 99944200903 Speed-Feed 450 Trimmer Head - Compatible with Echo SRM-266 SRM-266S SRM-266T SRM-266U SRM-280 SRM-280S - Replaces X047000940 ItemPackageDimensions_Height : 15.7 centimeters ItemPackageDimensions_Length : 7 centimeters ItemPackageDimensions_Width : 14.4 centimeters ItemTypeKeyword : string-trimmer-replacement-parts Manufacturer : BlueStars ModelName : UPGRADED 99944200903 Speed-Feed 450 Trimmer Head ModelNumber : 99944200903 NumberOfBoxes : 1 NumberOfItems : 1 PartNumber : 99944200903 PowerSourceType : gasoline-powered ProductDescription : SPECIFICATION Trimmer head diameter: 4-1/2 inch 10mm x 1.25mm LH thread FIX YOUR BROKEN TRIMMER Our 99944200903 Trimmer Head will fix the most common problems of your trimmer such as stuck trimmer head, the trimmer does not spin, or the threads stripping. These are signs that your trimmer head needs changing and our product is exactly what you need. PERFECT FIT BlueStars 99944200903 Trimmer Head replaces part # 99944200903, 78890-21001, X047000940, 385-288. It fits Echo SRM-266 (S/N T41913001001 - T41913999999; T42011001001 - T42011999999; T42112001001 - T42112999999; etc.), SRM-266S Steel Drive Shaft Trimmer, SRM-266T (S/N T42411001001 - T42411999999; T42512001001 - T42512999999; etc.), SRM-266U 25.4cc Straight Shaft Trimmer/Brushcutter, SRM-280, SRM-280S, SRM-280T, etc. EXTREMELY DURABLE The Trimmer Head is made from hard and sturdy metal and impact-resistant plastic that promises great durability while reducing the risk of breaks or cracks. The material combination is optimized for a prolonged lifetime. EASY TO INSTALL It is simple for both professional mechanics and DIY enthusiasts to quickly and efficiently replace the 99944200903 Trimmer Head. Please remind that safety first by wearing safety glasses and gloves before repairing. 100% LIFETIME WARRANTY Customer satisfaction is our relentless focus. If for any reason you're not completely satisfied, we will compensate you and offer extra benefits to ensure your rights. Buy with confidence! Size : Pack of 1 SupplierDeclaredDgHzRegulation : not_applicable SupplierDeclaredHasProductIdentifierExemption : 1 UnitCount : 2 UnspscCode : 27112000