Ductmate Industries GRDR241840F2GA - High Temperature Round Sandwich Duct for HVAC & Commercial Ventilation Systems

Galvanized steel doors are Sandwich style with template. Ideal for grease duct applications and includes a ceramic fiber gasket. Item: Sandwich Style High Temp Round Duct Shape: Rectangular Door Width: 23-1/4" Door Height: 17-1/2" Duct Diameter: 37" to 40" Material: Steel Finish: Galvanized Rough Opening Width: 23-1/4" Rough Opening Height: 17-1/2" Temp. Range: 2300 Degrees F max. Hinges: None Standards: NFPA106 Includes: Ceramic Fiber Gasket