"This Comfort Flame Flat Wall Horizontal Vent Kit brings fresh air in for efficient combustion and vents air back out. U.S.A. Mounting Hardware Included Yes, Adjustable Yes, Color Gray, Degree of Angle 45 or 90, Mounting Type Horizontal, Pieces qty. 24, Length in. 18, Material Type Stainless steel inner pipe, galvanized outer pipe, Fuel Type Natural gas, Pipe Design Double wall, Product Style Venting kits. For flat wall 32in. direct-vent fireplaces Includes elbows, adjustable pipe, stainless steel inner pipe and galvanized outer pipe"