3" to 4" PelletVent Pro Increaser - 3PVP-X4
This increaser is used to transition from 3" pipe to a 4" pipe. Not a reducer or stove adaptor.
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