M G Dura-Vent 10DCA-12 10 Inch x 12 Inch DuraVent DuraChimney II Pipe Features DuraChimney II is a unitized lightweight design which eliminates the need for field assembly of pipe sections DuraChimney II is designed to stay cool on the outside to provide a hot draft on the inside and to provide a fire-safe design that protects both the chimney and the building The double-wall air-cooled design allows the chimney to expand both radially and lengthwise under high temperatures Color - Stainless Size - 10 x 12 in.