HONYLITE specializes in the production of electromagnetic shielding products. The honeycomb vent is series of tubes that acts as a waveguide, guiding electromagnetic waves into or out of the enclosure, but as the tubes are long enough then it attenuates those waves. Typically the tube should be at least 3 times as long as the diameter. Good practice is 4 times. Therefore a 3.2mm cell should be 12.7mm long. Honeycomb material is used because it offers high shielding performance, light weight and good airflow.
Ventilation panels are designed for use in electronic enclosures where good air flow is required for cooling and ventilation but where EMC compliance must be ensured.