4" DuraVent DirectVent Pro Small Wall-Pass-Through Wall Thimble - 46DVA-WTS
This wall thimble provides a complete wall-pass-through and firestop. Use with Round Horizontal Cap, Sconce Cap, and H2 Horizontal Cap only. May be required in Canada. Refer to the appliance manufacturer's installation instructions for requirements.
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.