Selkirk 3"/4" x 10' Flexi-Sleeve For Flexi-Liner is designed only for use with Flexi-Liner. You can use it when the flue gas temperature is below 280-degreeF at the thimble/breaching, large portions of the chimney are located on the exterior of the house, the liner is venting fan-assisted appliances, or the flue cavity is much larger than the liner. This product ships in approximately 1 days
Carcinogens: This product can expose you to chemicals including Lead, which is [are] known to the State of California to cause c