[Compatibility] the spool is compatible with BLACK & DECKER model AF-100-3ZP, and the cover is compatible with RC-100-P. Suitable for the following BLACK & DECKER trimmer models: GH400, GH500, GH600, GH610, GH900, GH912, ST6600, ST7000, ST7200, ST7700, ST7701, ST8600, ST9000, CST1000, CST1100, CST1200, CST2000, MTC220, MTE912, NST1018, NST1024, NST1118, NST1810, NST2018, NST2118, LST120, LST136, LST140, LST201, LST220, LST300, LST400, LST420, LST522, LST1018, LSTE523, LSTE525, BESTA510.[Autofeed System Replacement Spool] the thread cutter replacement spool is compatible with the BLACK & DECKER thread cutter, and can use centrifugal force to transport the thread as needed, effectively reducing the tedious work of manually winding the spool.[High efficiency] the spool wire can be stretched and cushioned under the impact of a hard surface, and its aerodynamic shape can cut more effectively and reduce resistance, making weeding more efficient.[High Quality] the flexible and strong nylon spool is made of high-quality ABS material, which can easily pass through grass and weeds. Excellent spool, not easy to break, supports fast cutting, and has a long service life.Size: 30ft length, 0.065 inch diameterColour:As shownMaterial:ABS, nylonPackage Contents:4 x AF-100-3ZP replacement trimmer spools1 x RC-100-P cap1 x RC-100-P springOnly the above package content, other products are not included.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.