THIS IS A SEALED 50-ML PLASTIC CONTAINER WITH CLEANING LIQUID FOR BRUSHES (AIR-BRUSHES) AND PIPETTES USED WITH GRAPHITE, COPPER OR SILVER CONDUCTIVE PAINTS. JUST DIP A BRUSH (BRUSH NOZZLE) OR PIPETTE IN THE CONTAINER FOR 30-60 SECONDS AND THEN RINSE THEM IN COLD TAP WATER. THAT’S IT. KEEP IN SAME CONTAINER IN DARK COOL PLACE. SHELF LIFE – 2 YEARS.