# Master Flow 25 ft. Insulated Flexible Duct R6 Silver Jacket

**Brand:** [Master Flow](https://shop.coreranger.com/brands/Master%20Flow)
**Price:** $34.08–$128.99 · in stock
**URL:** https://shop.coreranger.com/product/master-flow-25-ft-insulated-flexible-duct-r6-silver-jacket-325461659

## Options

- **Product Diameter (in.):** 10, 14, 4, 6, 7

## Variants

| Variant | SKU | Price | Stock |
|---|---|---|---|
| 4 | F6IFD4X300 | $34.08 | in stock |
| 6 | F6IFD6X300 | $39 | in stock |
| 7 | F6IFD7X300 | $53.34 | in stock |
| 10 | F6IFD10X300 | $77.59 | in stock |
| 14 | F6IFD14X300 | $128.99 | in stock |

## Specifications

| Spec | Value |
|---|---|
| Color | Silver Jacket |
| Material | Fiberglass |
| Insulated | Yes |
| Pack Size | 1 |
| Returnable | 90-Day |
| Insulation R-Value | 6 |
| Product Width (in.) | 13.5 in |
| Product Length (in.) | 300 in |
| Wall Thickness (in.) | 1.75 |
| Maximum air flow (CFM) | 400 |
| Product Diameter (in.) | 10 |
| Certifications and Listings | ETL Listed,UL Recognized |

## Description

The Master Flow 10 in. x 25 ft. Insulated Flexible Duct R6 Silver Jacket is used in standard Heating and Air Conditioning (HVAC) systems and some venting applications. The duct has R6 insulation which contains 33% more insulation than the standard R4.2 product. This additional insulation provides greater thermal efficiency to save energy. The product is also covered in a heavy duty, silver jacket for durability. The duct is ETL listed, meeting the UL181 standard.

• R6 fiberglass insulation is perfect for heating and A/C systems
• Galvanized core wire resists rust and corrosion
• Insulated duct can withstand up to 200°F