4" Pre-Insulated Hybrid 316L Cut-To-Length Liner with smooth wall interior. Durable Stainless Inner & Outer Wall. This liner also provides zero/zero clearance inside a masonry chimney.
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.