7" DuraVent DuraBlack Snap-Lock with Trim 7DBK-ADSL This snap-lock with trim connects into the ceiling support box or finishing collar and extends down to fit into stove pipe for a drip-free connection to a DuraTech DuraPlus or DuraLiner Chimney system. Provides a strong mechanical connection. Adaptor will work with all 6" - 8" DuraPlus 7" - 8" DuraTech installations and 5" - 6" DuraTech Ceiling Support Box installations only. 24-gauge strength Lock seams 18" clearance to combustibles Painted black Single-wall interior stove pipe for connecting wood stoves to manufactured chimney Economical and drip-free connection No need for cutting or crimping 10â€-24†diameter pipes feature an .027†430 stainless steel inner wall and an outer wall of .029†galvalume or .027†430 stainless steel. A Refractory insulation is encased between walls. Only stainless pipes use the stainless end rings. Regular galvalume pipe uses galvalume end rings.