Description
Sandwich-style model has a 4" x 2-5/8" viewport. Item: Sandwich Style Observation Access Door Shape: Rectangular Door Width: 17-1/4" Door Height: 13-1/2" Duct Diameter: 7" to 9" Material: Steel Finish: Galvanized Rough Opening Width: 16" Rough Opening Height: 12" Temp. Range: 200 Degrees F max. Hinges: None Standards: SMACNA Includes: Double Pane Safety Glass Viewport/Insulated