Innsbrook Direct-Vent Insert Vent kit (DVKI-2) includes Empire Sheet metal Co-linear Adapter, SD-46DVAGK (Linear Termination kit), SD-2880 (Flex Extension 3' x 35'), SD-46DVACH (Hi-Wind Vertical Top-Round).
A Vent extension kit is also available-it includes 35' flex, 2 connectors and 4 clamps.