---
product_id: 601495894
title: "6 in. x 25 ft. Insulated Flexible Duct R4.2 Silver Jacket, 6 - Flexible Ductwork - Ducting & Venting"
brand: "cuchiilo"
price: "€ 84.72"
currency: EUR
in_stock: true
reviews_count: 8
url: https://www.desertcart.ie/products/601495894-6-in-x-25-ft-insulated-flexible-duct-r4-2
store_origin: IE
region: Ireland
---

# Up to 85% noise reduction R-4.2 thermal insulation rating 6-inch diameter for versatile HVAC fit 6 in. x 25 ft. Insulated Flexible Duct R4.2 Silver Jacket, 6 - Flexible Ductwork - Ducting & Venting

**Brand:** cuchiilo
**Price:** € 84.72
**Availability:** ✅ In Stock

## Summary

> 🌬️ Elevate your airflow game with flexible, insulated ducting that works as hard as you do!

## Quick Answers

- **What is this?** 6 in. x 25 ft. Insulated Flexible Duct R4.2 Silver Jacket, 6 - Flexible Ductwork - Ducting & Venting by cuchiilo
- **How much does it cost?** € 84.72 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/601495894-6-in-x-25-ft-insulated-flexible-duct-r4-2)

## Best For

- cuchiilo enthusiasts

## Why This Product

- Trusted cuchiilo brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Quiet Comfort Zone:** Fluffy glass wool core absorbs sound, slashing noise by up to 85% for a peaceful environment.
- • **Durable & Resistant:** Thick aluminum foil jacket with spiral steel wire resists heat, acid, alkali, and flame—built to last.
- • **Premium Thermal Shield:** R-4.2 Owens Corning glass wool insulation keeps your system energy-efficient and temperature-stable.
- • **Flexible Fit, Zero Fuss:** Bend and shape without rigid elbows—perfect for custom HVAC layouts.
- • **Multi-System Compatible:** Ideal for central air, fresh air ventilation, and mechanical recovery systems without corrosive gases.

## Overview

This 6-inch by 25-foot insulated flexible duct features a robust aluminum foil jacket reinforced with elastic spiral steel wire and high-performance Owens Corning glass wool insulation rated R-4.2. Designed for HVAC systems, it offers superior thermal resistance (-4℃ to 454℃), reduces noise by up to 85%, and maintains shape without rigid elbows, ensuring efficient airflow and durability in various ventilation applications.

## Description

Full description not available

## Features

- 【🌿🛒High-quality performance 6 insualted duct】Made of thickened aluminum foil material and made of high-strength elastic spiral steel wire.The middle is covered with glass fiber insulation layer, which has high temperature resistance, acid and alkali resistance, and flame retardancy.
- 【🌿🛒Owens Corning Glass Wool Insualtion 】Glass wool Insualtion is the safest building material, with high corrosion resistance and thermal insulation,R value: R-4.2. The temperature resistance range is -4℃~454℃.
- 【🌿🛒Sound absorption and noise reduction insulation】 The internal structure of glass wool insulationis fluffy and the overall density is large, which can absorb the sound in time,Noise can be reduced by up to 85%.
- 【🌿🛒6 inch Flexible Duct】 It can be bent arbitrarily, without rigid elbows, the aluminum foil is self-sustaining and will not retract after installation.It can maintain the flatness in the tube and reduce the wind resistance.
- 【🌿🛒Multi Function】Used for high, medium and low pressure ventilation system without corrosive gas. Mainly used in central air conditioning HVAC system,Fresh air ventilation systems, mechanical equipment recovery systems and other ventilation systems that do not contain corrosive gases, etc.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Cuchiilo |
| Item Weight | 8.51 pounds |
| Product Dimensions | 300 x 6 x 0.04 inches |
| Size | 6 IN 25 FT |
| Color | R-4.2 Insulation |
| Material | Aluminum, Fiberglass |
| Item Package Quantity | 1 |
| Coverage | 549.78 square feet |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Material:** Aluminum, Fiberglass
- **Brand:** Cuchiilo
- **Recommended Uses For Product:** ventilation systems, air conditioning, and heating systems
- **Product Dimensions:** 300"L x 6"W
- **Manufacturer:** Cuchiilo

## Images

![6 in. x 25 ft. Insulated Flexible Duct R4.2 Silver Jacket, 6 - Flexible Ductwork - Ducting & Venting - Image 1](https://m.media-amazon.com/images/I/71WBnYiYrLL.jpg)

## Available Options

This product comes in different **Color, Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Use 6 inch starter attachment on main trunk
*by P***L on July 12, 2025*

Used for an additional duct line. Works just fine

### ⭐⭐⭐⭐⭐ Tough Enough if you're careful
*by M***K on December 17, 2024*

The inner "foil" layer was much tougher than another reviewer said. It's more of a "mylar" plastic silver mirror kind of material. I only needed 15 to 17 feet, so I didn't mind ruining the end I attached to a rope for pulling through the hordes of black widows and rattlers. The insulation is as expected. I did tear the outer layer just a tiny bit pulling it with a rope I'd fish-taped through a confined crawlspace trench I had to hand-excavate. Attaching it firmly to the flanges worked well however the Hose Clamp, or Radiator Clamp style items supplied were some metric size I had no socket bit for. So, picture a guy on his back in dirt with spider webs hanging down trying to use a flathead driver on his drill to tighten a long long long clamp. One spider said: Hey, how-ya-doin?" I have patience. I attached it to one flange from inside the home, the other from underneath. Both ends were easier than expected. This is a quality product, but fragile as you might imagine. Be careful of it and it's tough enough and a good value.

### ⭐⭐⭐⭐ Ok and it worked, but thinner material.
*by C***E on April 18, 2025*

Needed to extend a register in the basement and this worked for the purpose. Much cheaper than alternatives, but the material is a little think and tears easier than a name brand product. Worked for my purpose, but just be careful when slipping over the fitting.

## Frequently Bought Together

- Cuchiilo 6 Inch 25 Feet Insulated Flexible Duct R4.2,Flex Duct Insulated, for Heating and Air Conditioning HVAC Systems
- MIAHART 6 inch Hose Clamp Adjustable 304 Stainless Steel Duct Clamps Worm Gear Adjustable 141mm-165mm Hose Clamp (Pack of 6)
- Lambro #246 6" Aluminum Duct Connector

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-01-23*