Product Description 3", 3VP-AF, Adjustable Pellet Flashing. Model VP, Type L Pellet Vent. Flashings provide a transition at the roof through which the vent will pass. Flashings are used for keeping water and other debris from entering between the pipe and roof. Designed for roofs having a slope of 0/12 flat to 6/12. Has an adjustable pitch. This item is UL listed. From the Manufacturer 3", 3VP-AF, Adjustable Pellet Flashing. Model VP, Type L Pellet Vent. Flashings provide a transition at the roof through which the vent will pass. Flashings are used for keeping water and other debris from entering between the pipe and roof. Designed for roofs having a slope of 0/12 flat to 6/12. Has an adjustable pitch. This item is UL listed.