M&M Insulated Register Box, 640R6 Model, 7 in Collar Size, 12 in L, 6 in W, 4 in H, 30 ga, Fiberglass, Steel, Silver
| Length | 12 in |
| Width | 6 in |
| Height | 4 in |
| Material | Fiberglass, Steel |
| Color | Silver |
- Standard size #640R6 register boxes are lined with 1-1/2 in duct liner to provide an R-Factor of R-6
- Without snap-rail flange
Catalog