# Master Flow 8 in. x 4 in. to 4 in. Insulated Register Box

**Brand:** [Master Flow](https://shop.coreranger.com/brands/Master%20Flow)
**SKU:** IRB8X4X4
**Price:** $19.56 · in stock
**URL:** https://shop.coreranger.com/product/master-flow-8-in-x-4-in-to-4-in-insulated-register-box-100193986

## Specifications

| Spec | Value |
|---|---|
| Model # | IRB8X4X4 |
| Pack Size | 1 |
| Internet # | 100193986 |
| Returnable | 90-Day |
| Store SKU # | 408009 |
| HVAC application | All HVAC types |
| Product Depth (in.) | 6 in |
| Product Width (in.) | 10 in |
| Product Height (in.) | 6.5 in |
| Product Weight (lb.) | 1.63 lb |
| Manufacturer Warranty | Free from Manufacturer Defect at Time of Delivery. |
| Brand/Model Compatibility | Universal |

## Description

The Master Flow 8 in. x 4 in. x 4 in. Insulated Register Box is designed for durability. This register box is made of zinc-coated, 30-gauge galvanized steel. The 1 in. fiberglass insulation helps reduce HVAC system noise and absorb condensation for a quiet and efficient system. This register box can be installed with sheet metal screws.

• Use to connect pipe or insulated flex duct to register grille
• Durable galvanized steel construction
• Pre-insulated, no need to wrap