Compatible with:This weed eater string trimmer spool and cap is compatible for Harbor Freight Bauer 19115C-B 20V cordless weedwacker string trimmerhigh quality ABS and polyamide nylon:High-quality ABS spool & durable polyamide nylon thread, flexible and long service life. Use centrifugal force and aerodynamics to reduce drag and achieve fast cutting. It is recommended to wear goggles and long pants during use to avoid unnecessary injury.Package included:8 x grass trimmer spools,2 x weed eater spool cap cover,they are great weed trimmer replacement partsautomatic feed spool : The weed eater spool automatically feeds the trimmer by centrifugal force, reducing the tediousness of manually sorting out the replacement trimmer line spool during work.Spool Specification:Weed eater line diameter: 0.065in/1.65mm,lenght: 10ft/3m,it provides a wider range of mowing