Provide your isopods or Invertebrates the best care. Easy to install with a drill and 2 inch circle saw bit. The 130 micron mesh will keep in/out even the smallest critters like springtails while providing optimal airflow. When the water wicking system is installed on your bin you never have to worry about over watering or drowning your little critters.
Comes with 
2x - Two inch screw together vents
2x - Two 130 micron mesh covers fitted to size
1x - 100% cotton wick cord shrink wrapped where needed to fit your containers flush.