4" X 36" B-Vent Singlewall Gas Connector, Singlewall Flexible Construction, Includes An Integral Appliance Draft Hood Connector For Fast Installation, Locks Onto Hart & Cooley Gas B Vent, Requires 1" Clearance To Combustibles Per Installation Instructions, UL Listed For Use As a Connection From An Appliance To Type B Gas Vent In Conditioned Spaces Only, (DO NOT ENCLOSE), Dims:4" X 4" Dia. X 36"L, Weight:2 Lbs, In MFG Box, Made In Mexico. Sold Individually