DuraVent 8DT-WSSS 8" DuraTech Stainless Wall Strap. DuraVent is a leader in the venting industry. DuraVent has a large line up of venting products and continues to design safe and efficient venting part and products. This DuraVent 8DT-WSSS 8" DuraTech Stainless Wall Strap features a unique 2" wall offset that distances the vent from the wall. The 8" strap support is compatible with 8" single wall, double, and triple wall lengths of pipe.