BDM Dalsin Line Pro-Form 12" Vertical Round Base Only for 3" x 3" Co-Linear Cap high-efficient-wall-furnace 1 x 8-foot long (2

1 x 8-foot long (2

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BDM Dalsin Line Pro-Form 12" Vertical Round Base Only for 3" x 3" Co-Linear Cap high-efficient-wall-furnace 1 x 8-foot long (2"Dalsin Line" Aluminum Flex Liners are used for venting category 1 heating appliances or direct vent appliances into a masonry chimney. Manufactured using Type 3003 aluminum, this heavy duty 2 ply liner is made from two strips of . 005", high grade aluminum for a total thickness of . 010" What's Included 12" Vertical Round Base Only Features Liner is made from 2 ply of . 005 thick type 3003 aluminum strip Components are made from . 020 thick type 3003