Product Description Material: ABS + nylon + carbon steel Size: Coil, 9.14m * 1.65mm; Coil cover, 86*34mm; Spring, 23*36mm Colour: Black Quantity: 1 set Package content: coil * 6, cover * 1, spring * 1 1.Max. Length of single thread spool is 9.14 meters and thread diameter 1.5 mm. 6 pcs thread spools the total length is about 55m, satisfy your long-term use. 2. Replacement line spool suitable for GH400 / GH500 / GH600 / GH900 / GH912 / ST6600 / ST1700 / CST1000 / CST1200 / CST2000 / MTC220 / MTE912 / NST2018 / NSTILI8 / NST21 / LST220 / LST300 / LST400 / LST13420. 3. Device plugged together easily and works. The grass trimmer spool can be exchanged in just a few simple steps. 4. Trimmer accessories- This trimmer line still contains a spring and a spool cover cap, fully compatible spare part. 5. Inserting and removing the coil is tool-free and uncomplicated. At the same time, damage to the device is avoided and the thread is used optimally.