SELKIRK CORP 244825 4-Inch  Adjustable Pellet Flashing 4" inch, 4VP-AF, Adjustable Pellet Flashing Type L pellet vent flashings provide a transition at the roof through which the vent will pass Designed for roofs having a slope of 0/12 flat to 6/12 Used to seal the opening where the venting penetrates the roof and to divert rain and snow down from the roof and away from the pellet pipe system Features rolled over male end, which eliminates sharp edges