COMPATIBLE WITH Contour 500 XT?Power Trim 500 XT?Mini Trim Auto ST/XT/Plus XT?Mini Trim Contour XT?Speedi-Trim?Contour?Contour 500/700?Mini Trim Auto/Auto, and Multi Trim 250D/250DX/300D/300DX?Power Trim (pnc 9648641)?Power Trim 500/700 (pnc 9648596/7)?Revolution 2000/2300/2500 and Twist and Edge. Please do check the model carefully before purchasing to make sure it's the right fitting you need Package Included: 4/6/10 x replacement trimmer line spool for Flymo FLY021 ABS SPOOL & NYLON LINE - The edger replacement string spool line were made of premium quality raw material, ABS spool sturdy enough, nylon line string flexible, strong enough for long working life. SAVE WORKING TIME-easy to use and install pre-wound Tool-less installment, pops in and out of trimmer for ease of use,long lasting saves you time and energy USER PRECAUTIONS - Strong centrifugal force and cutting fast during using, recommend to wear eye protection and long pants to avoid unnecessary injury. And this cordless weed eater parts refill is only suitable for tender weed grass. Strong weeds will been recommended to use blades to trim. Compatible with Contour 500 XT?Power Trim 500 XT?Mini Trim Auto ST/XT/Plus XT?Mini Trim Contour XT?Speedi-Trim?Contour?Contour 500/700?Mini Trim Auto/Auto, and Multi Trim 250D/250DX/300D/300DX?Power Trim (pnc 9648641)?Power Trim 500/700 (pnc 9648596/7)?Revolution 2000/2300/2500 and Twist and Edge Specification: Name: Trimmer Replacement Spools Material: ABS Each Spool Length: 32 feet/11m Strimmer Spool Line Diameter: 0.062inch/1.5cm Package: 4/6/10 x Trimmer Replacement Spool