RS-136 Replacement String Trimmer Spool Line for BLACK+DECKER ST4000 ST4500 (1 Spool 1 Cap and 1 Spring) FITS MODELS - Compatible with Black&Decker string trimmer models: CST500, CST800, GE600, ST1000, ST200, ST300, ST3000, ST400, ST4000, ST4400, ST4500, ST5000, ST6500, ST6800. Spool model: RS-136 / RS-136-BKP / 143684-01. Cap model: 682378-02._x000D_ SPOOL SPECIFICATION - 20ft 0.065 inches line string trimmer replacement spool compatible with Black&Decker original spools models RS-136 / RS-136-BKP / 143684-01. Length 20 foot trimmer line provides a wider range of mowing area. 0.065 inches diameter wearable line supports fast cutting and longer lifetime._x000D_ DURABLE MATERIAL - Premium ABS automatic bump feed spool & durable polyamide nylon string trimmer/edger replacement line, pliable and flexible and long service life. Use centrifugal force and aerodynamics to reduce drag and achieve fast cutting string glitch-free._x000D_ CONVENIENT&TIME-SAVING - Snap into place for quick and effortless replace without tools. Professional CNC machine cutting and automatic winding is more time-saving than manual winding, reduces damage for string grass trimmer and not get stuck when mowing._x000D_ PRECAUTIONS FOR USE - Wear goggles and long pants when using this product to avoid injury from spilling lines. Unplug tool before changing, installing, or removing accessories. This cordless weed eater parts refill is only suitable for young grasses. Strong weeds use other tools._x000D_ _x000D_ size:20 feet long, 0.065inch diameter_x000D_ Material:ABS, nylon_x000D_ colour:Black_x000D_ _x000D_ Package Contents:_x000D_ 1 x String Trimmer Spool Line_x000D_ 1 x Cap Cover_x000D_ 1 x Spring_x000D_ _x000D_ Only the above package content, other products are not included._x000D_ Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_