Cuban Crafters Round Plastic Cigar Humidifier Puck, 2 1/8" Diameter x 1/2" thick. Prevents tobacco from drying. Resin. Black. Half of velcro patch on back. In good condition with light wear. Add distilled water or cigar solution before putting in humidor. Do not add too much water, just make it wet, do not soak. Turn upside down to get any water out that might leak out. Dry outside with a clean cloth before putting in humidor. Refresh with distilled water every 6 - 8 weeks.