For use when changing colours in your Thermelt Knot Filler gun. Putting one of these neutral cleaning sticks through your Knot Filler gun when changing colour, ensures the new colour isnβt contaminated by the previous Thermelt stick. Use your Knot Filler Saver to minimise wastage and keep the remnants of the previous colour for re-use. Supplied as a bag of 8 cleaning sticks, 150mm x 12mm diameter.-bg