Product Name: HVAC System Plastic Product Air Vent Flexible One Way Cover Pipe Fitting

Feature:

1.    The gravity louvred vent commonly known as a flag vent is designed to allow air to be vented to atmosphere, while stopping cold air and pests entering the system when not in use.
2.    The louvreds are specially manufactured in a curved shape to assist in keeping the vent closed if effected by wind or drafts.
3.    Modern, round edge with mounting holes in each corner.
4.    Calcium filled polypropylene plastic