Upgraded 25-2 Bump Feed Trimmer Head, Compatible With Most Stihl Weed Wackers, Product Features Same as Which Trimmer Head Models: Trimmer head replacement number compatible with Stihl 25-2 Bump Feed Trimmer Head, 4002 710 2108, and 4002 710 2191 Which Weed Wacker Model are Compatible: Compatible with Stihl weed eater model FS44, FS55, FS55R, FS56 (From 2008), FS56RC, FS56RCE, FS70, FS70R, FS74, FS76, FS80 (From 1996), FS80R, FS83, FS85, FS85R, FS87, FS90 (From 2005), FS90R, FS91, FS91R, FS94, FS94R, FS100, FS100RX, FS110, FS111R, FS111RX, FS120, FS130, FS130R, FS131, FS131R, FS200 (From 1997), FS240, FS250, FS260R, FS460R (From 2011) Which Weed Wacker Model are Compatible: Compatible with Stihl weed wacker model FR85, FR85T, FR106, FR108, FR130T, FR220, FR350, FR410, FR450, FR460, FR480, FSA90R, FSA130R, FSA135, FSA135R, KM55, KM56, KM85, KM90, KM94, KM100, KM110, KM120, KM130, KA85, KA85R, KR85, FS-KM Head Size: Bolt Size: 10mm x 1.0 LHF; Overall Width: 4.8"(121.9mm); Overall Height: 2.56"(65mm); Pre-loaded with 13-ft of .095-in string, compatible string's diameter: .065", .080", .095", .105", or .120". Performance Crush: material upgrade brings good quality. As we all know, the trimmer head rubs against the ground at high speed, the temperature rises and it is susceptible to wear. Our upgraded trimmer head is made from nylon and glass fibre material, which improves heat resistance, wear resistance and hardness by 30% to 40%, resulting in a longer service life. This is a significant improvement in performance over other plastic weed eater heads in use. No Disassembly for Loading and Easy Feeding: Simply insert the line and turn the knob to reload the line in less than 30 seconds (no kinks in the winding process). And when it's time to feed, a light tap on the head extends the line without stopping and making manual adjustments. Designed for lawn care professionals to provide reliable convenience. Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!