MaterialThese unclog sticks are made with powerful enzymes to prevent deposits and odors in kitchen, bathroom and fresh air exhaust systems.Easy to UseDrop it out and put it in the sewer every month. One drain stick keeps the canal clean for a month. A pack of 12 sticks lasts for a year.NON-TOXIC AND NON-CONDUCTIVEBreaks down and captures organic deposits and grease. non-pathogenic bacteria. don't worry about the environmentApplicationThese drain cleaning swabs can be used on plastic and metal pipes. Safe for kitchen, sink, tub, shower, sink and toilet drains.[Scope of delivery] 36 dredge sticks, packing size: 2213, color: purple and blue and green. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.