Stainless steel inner and galvanized outer pipe.

Diameter Sizes: 5", 6", 7" & 8"

Part Identification: Letter UT and GT

Clearances: 2" of airspace to Combustibles

Temperature Ratings: 2100°F (Maximum Test 10 min.) 1400°F (Maximum for 60 min.) 1000°F (Maximum Continuous Operating Temperatures)