Selkirk Corporation 4807 Heat-fab Saf-t Liner 8 Inch x 36 Inch 304-alloy Each piece of Selkirk Heat Fab Saf-T Liner is constructed of seam-welded 24 Gauge stainless steel. This 304 Alloy version carries a lifetime workmanship and materials warranty for wood burning applications. Saf-T Liner comes pre-drilled with pop rivets included. for insulation use Heat Fab Saf-T Wrap - aluminum-jacketed sections of ceramic blanket that snap and lock around your pipe. Heat Fab Saf-T Liner is UL listed to the 1777 Standard where 1 of clearance from chimney exterior combustibles is present when Saf-T Wrap Insulation is used. Heat Fab 36 . Saf-T Liner for 8 Pipe. Constructed of seam welded 24 Gauge stainless steel. Comes pre-drilled with pop rivets included. UL Listed to 1777 Standard with 1 clearance with Saf-T Wrap.