FLY021 Set of 6 double thread spools Coverage: 28g spool: 44gCompatible with Contour 500 XT Power Trim 500 XT Mini Trim Auto ST/XT/Plus XT Mini Trim Contour . 500/7 00 (pnc 9648596/7) Revolution 2000/2300/2500 and Twist and Edge. Please check the model carefully before purchasing to ensure it is the correct fitting you need ABS Spool & Nylon Line: The trimmer replacement line spool was made of premium quality raw material , quite sturdy ABS spool, soft nylon rope, strong enough for a long service life. Save labor time - Easy to use and install pre-wound - Tool-free installation - Installs and removes from trimmer for easy use - Long lasting to save you time and energy Package Contents Packing: 4/6/10 Replacement Line Spools for Flymo FLY021 Trimmer Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Dadangjia