【Compatible with】AF-100 polycarbonate head line compatible with Black Decker string trimmer: GH900, GH600, LSTE525, LST300, BESTA510, LCC340C, LST522, ST8600, ST7700, ST7000, ST6600, NST2118, NST2018, NST1118, MTE912, MTC220, LSTE525BT, LSTE523, LST420, LST400, LST220, LST201, LST140C, LST136W, LST136B, LST136, LCC222, LCC221, LCC140, GH912, GH610, GH500, GH400, CST2000, CST1200, CST1000, BESTE620, BESTA512. 【New Upgrade】AF-100-BKP trimmer line diameter 0.11" is made of tough nylon material with a tensile strength of 200 lbs, providing good abrasion resistance and durability,this allows it to effectively resist wear and breakage while mowing lawns.Use it with our AF-100-BKP trimmer head to greatly save your working time and costs. 【More Efficient】The AF-100-3ZP replacement thicke line is has a thicker diameter. Great for thicker grass that your spool may not be able to handle.Wear-resistant, won't break, and also protects gardeners' safety. 【Quickload】The upgraded version of the 36 pack AF-100 precut line reduces the cumbersome installation process and is easy to install.Trimmer Head fixed dual blades don't worry about getting stuck during installation. 【Package Includes】Pre-cut bold line * 36 pack，Screw * 6 pack，Wrench * 1.If you have any installation or model problems, you can contact us, we will give you a satisfactory answer within 24 hours. AF-100 polycarbonate head line compatible with Black Decker string trimmer: GH900, GH600, LSTE525, LST300, BESTA510, LCC340C, LST522, ST8600, ST7700, ST7000, ST6600, NST2118, NST2018, NST1118, MTE912, MTC220, LSTE525BT, LSTE523, LST420, LST400, LST220, LST201, LST140C, LST136W, LST136B, LST136, LCC222, LCC221, LCC140, GH912, GH610, GH500, GH400, CST2000, CST1200, CST1000, BESTE620, BESTA512.