Pipe sections combine corrosion-resistant stainless steel and sturdy galvanized steel for strong chimney construction. Lightweight pipe with snap-lock joints offers faster easier installations. Features a space-age refractory blanket between the stainles s steel/galvanized walls to withstand intermittent temperatures up to 2100 degrees F. as called for in UL 103 HT Standard. Requires 2in. air space to combustibles. • Ameri-tec • 8in. ID - 11in. OD • Lgth In=12