No 645R6 register boxes have adjustable 45 deg collars and tabs. The registers boxes are lined with 1 1/2 in R-6 duct liner.
M&M Register Box, Series: 645R6, 5 in Collar, 8 in Length, 4 in Width, Steel, Galvanized
- Series 645R6
- Size 8 x 4 x 5
- Width 4 in
- Length 8 in
- Collar Size 5 in
- Adjustable 45 deg collar