IHPSV4.5F | Flat Roof Flashing | SV4.5" and 7.5" Concentric Vent | 77L78 | IHP570440199SKU:77L78Inventory ID:03611716Select Item:Price: $162.00Quantity: Storm collar is supplied with the flashing. SV4.5F venting component is used on some Astria, Superior, and Lennox gas burning direct vent fireplaces. Check your model's Installation Manual for listed Secure Vent Components. Reviews Choose your rating12345