The standard size 601 register box with snap rail flange is available in 9 different sizes for connection to round duct from 4 in through 9 in Dia.
M&M Standard Uninsulated Register Box With 1 in Snap Rail Flange, Series: 601, 7 in, 12 in Length, 6 in Width, 30 ga, Steel, Galvanized, Silver
- Series 601
- Size 7 in
- Width 6 in
- Length 12 in
- Collar Size 7
Catalog
- Register boxes size from 4 in through 9 in Dia connections