4" Forever Flex Mortar Collar - MC4

This mortar collar is used to create a round passage through a masonry chimney that will work with an appropriate size liner pipe when making a connection to a heating appliance.

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.