#645 Register Boxes have Adjustable 45° Collars and Tabs. The registers boxes are lined with 1" R-4 Ductliner.
| M&M Manufacturing Co. | |
|---|---|
| Product Category | HVAC Ductwork |
| Product Number | 6451086 |
| Product Name | #645 Adjustable 45° Collar w/Tabs |
| Application | Commercial |