METAL-FAB® 3MPT Round Partition Thimble, 3 in Dia, Aluminum, Galvanized

• Products tested and listed to UL 441 requirements to ensure safety and efficiency
• Adjust from 4 to 6-1/2 in for variable wall thickness
• For use with double wall type B-Vent
• The outer wall is constructed of galvanized steel, 0.018 in THK G-90 for sizes 3 to 14 in Dia and 0.024 in THK G-90 for sizes 16 to 30 in Dia
• The inner wall is constructed of aluminum alloy, 0.012 in THK for sizes 3 to 8 in Dia and 0.018 in THK for sizes 10 to 30 in Dia
• The vent includes an integral, annular insulating air space, 1/4 in THK for sizes 3 to 6 in Dia and 1/2 in THK for sizes 7 to 30 in Dia