[Spool Cap Specification]: Compatible with For spools, 20ft 0.080 inches, compatible with spools models -080 / -080-BKP and cap covers models 90583594. [Compatible models]:Compatible with For weed eater string trimmer Cap:GH3000, GH3000R, LST540, LST540B. [Professional CNC winding spool Cap]: Compatible with green works spools by the CNC machine cutting and winding, automatic line change. Manual winding is cumbersome and can easily get stuck during use, which can cause damage to the string trimmer. [Precautions for use]: When you using this product, protective measures should be taken to avoid damage to the body caused by spilled wires. The product is only suitable for young grasses. For strong weeds, use other tools such as blades to trim. Colour: Orange Material: ABS Package Contents: 3 * Trimmer Cap Covers Only the above package content, other products are not included. Note: Light 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.