IHPSV4.5LA | 2" to 7.5" Telescopic Slip Rigid Pipe Length | SV4.5" and 7.5" Concentric Vent | 77L75 | IHP570440187SKU:77L75Inventory ID:03611723Select Item:Price: $96.00Quantity: Rigid vent cannot be cut. Telescopic Slip adds 2" to 7.5" length of vent. SV4.5LA 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