IHPSV4.5E45 | 45° Elbow | SV4.5" and 7.5" Concentric Vent | 77L76 | IHP570440189SKU:77L76Inventory ID:03611714Select Item:Price: $128.00Quantity: The elbow feature a twist section to allow them to be routed about the center axis of their initial collar section to align with the required direction of the next vent run element. Angle is not adjustable. SV4.5E45 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