  3" Round Polypropylene Plastic Louver 
  Easy Installation into wood - may not work with metal glass or PVC pipe ~ Recommend using drill type hole saw ~ Held in place by knobs on the side of vent. 
  Multi-purpose - for eaves, reptile cages, display cases, spice racks, and any other place where you need air ventilation. ~ Ideal for room exhaust and intake ventilation use 
  Color: Black ~ Quantity: 2 Vents per order ~ Made in USA 
  Fits 3-inch round holes.
PACK OF 2 VENTS