The Mushroom Vent Cap is designed to fit 3" or 4" caps, providing an effective solution for venting applications. Constructed from durable materials, this vent cap ensures longevity and reliable performance in various weather conditions. Its unique mushroom shape allows for optimal airflow while preventing debris and water from entering the vent system. Ideal for use in residential and commercial settings, this vent cap meets industry standards for ventilation, making it a practical choice for maintaining air quality and system efficiency.