IHPSV4.5SU | Support Strap | SV4.5" and 7.5" Concentric Vent | 96K93 | IHP570440217SKU:96K93Inventory ID:03611725Select Item:Price: $85.00Quantity: Install support straps every 5 ft. on horizontal sections and every 8 ft. on vertical sections. SV4.5SU 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