Auto Feed System Replacement - The trimmer replacement spool is compatible with Worx string trimmer and utilizes centrifugal fo.rce to feed the trimmer line as it is needed. The auto feed system replacement spool eases the tedious work of hand-winding spoolsHigh Quality - Premium weed eater string with 10ft/ 0.065 inch Edger Spool Line and Cap easily cuts through grass and weeds.Professional Design - Pliable and flexible allowing for the line to stretch and cushion on impact with hard surfaces; Aerodynamic shape allows less drag for more efficient cuts.Colour: OrangeMaterial: plasticPackage Contents:8 * big grass head1 * coil cover(with PE bag)Only 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.