Dundas Jafine Vent Increaser is designed to easily adapt any 4-inch dryer to an existing 3-inch venting system, providing a seamless connection for your ventilation needs. Made from durable aluminum, this vent increaser ensures reliable performance and long-lasting use. With a size specification of 3 inches diameter to 4 inches diameter, it a practical solution for venting adjustments. The package includes one increaser vent, making it a convenient choice for your home or professional projects. Model Number: RA34