3" to 4" Type B Gas Vent Diameter Increaser - 3BVX4
The Diameter Increaser is used to increase the diameter of a vent special order.
WARNING: Carcinogens: This product can expose you to chemicals including Lead, which is [are] known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.
Limited Lifetime Warranty
