*PLUMBERSSTOCK EXPERT* responded:
Thank you for your interest in the M&G DuraVent 3012AB! According to the manufacturer, there’s no Black Pellet Vent Pipe with that size of length. There are 4” diameter with 12’ long black pipes that you can check on page 45 of their parts list. They are not yet available on our website but we can place an order from the manufacturer for you, please contact one of our knowledgeable customer service representatives @ 435-868-4020 or through e-mail @ firstname.lastname@example.org.