This UL Listed Saf-T Thimble allows single-wall stove pipe to pass through a combustible wall. It attaches to the chimney therefore avoiding a dangerous breach should the chimney settle and start to pull away from the house. Features a solid-pack insulation that telescopes inward toward the wall, allowing for easy adjustment for wall thicknesses of 4" - 8 1/2".
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.