Product details:

Gasketed Coupler, Duct Fitting Diameter 14 in, Duct Fitting Length 42 in, Width 14 in, Duct Fitting Material Galvanized Steel, 24 Gauge, Gasketed Coupler, Height 14, Coating Galvanized, W.G. (30 in Positive / 30 in Negitive), Standards SMACNA, Self Sealing, No Fasteners Required, Reusable, Double-Bolt Design, For Use With Round Duct, Light Gauge Tubing or Hoses