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Rectangular Duct Fittings


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20" x 10" Vertical Duct Elbow
Manufacturer: National Excelsior Company
SKU# 139179
26" x 8" Vertical Duct Elbow
Manufacturer: National Excelsior Company
SKU# 139176
24" x 8" Vertical Duct Elbow
Manufacturer: National Excelsior Company
SKU# 139175
22" x 8" Vertical Duct Elbow
Manufacturer: National Excelsior Company
SKU# 139174
20" x 8" Vertical Duct Elbow
Manufacturer: National Excelsior Company
SKU# 139173
18" x 8" Vertical Duct Elbow
Manufacturer: National Excelsior Company
SKU# 139172
16" x 8" Vertical Duct Elbow
Manufacturer: National Excelsior Company
SKU# 139171
20" x 10" to 24" x 8" Duct Offset Starting Collar
Manufacturer: National Excelsior Company
SKU# 139079
20" x 10" to 22" x 8" Duct Offset Starting Collar
Manufacturer: National Excelsior Company
SKU# 139078
7" to 12" x 6-1/2" Side Takeoff
Manufacturer: National Excelsior Company
SKU# 113717
1 2 3 4 5 6 7 8 9 10 Next Total: 16