---
product_id: 74280170
title: "4\" X 3\" Duct Reducer & Increaser Non-Crimped Single Wall Galvanized Sheet Metal ducting Connector for Airflow, Heating, Cooling, & air Ventilation Systems Fittings"
brand: "the sheet metal kid"
price: "Bs.38"
currency: BOB
in_stock: false
reviews_count: 3
url: https://www.desertcart.bo/products/74280170-4-x-3-duct-reducer-and-increaser-non-crimped-single
store_origin: BO
region: Bolivia
---

# Optimized airflow efficiency 4" x 3" precise fit Galvanized steel durability 4" X 3" Duct Reducer & Increaser Non-Crimped Single Wall Galvanized Sheet Metal ducting Connector for Airflow, Heating, Cooling, & air Ventilation Systems Fittings

**Brand:** the sheet metal kid
**Price:** Bs.38
**Availability:** ❌ Out of Stock

## Summary

> 🔧 Upgrade your airflow game with the ultimate duct connector!

## Quick Answers

- **What is this?** 4" X 3" Duct Reducer & Increaser Non-Crimped Single Wall Galvanized Sheet Metal ducting Connector for Airflow, Heating, Cooling, & air Ventilation Systems Fittings by the sheet metal kid
- **How much does it cost?** Bs.38 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.bo](https://www.desertcart.bo/products/74280170-4-x-3-duct-reducer-and-increaser-non-crimped-single)

## Best For

- the sheet metal kid enthusiasts

## Why This Product

- Trusted the sheet metal kid brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Effortless Installation:** Crimped design ensures quick, secure fitting with standard HVAC tools
- • **Universal Compatibility:** Works flawlessly with both flexible and rigid HVAC ducts
- • **Premium Galvanized Steel:** Built to last with corrosion-resistant, high-strength metal
- • **Seamless Size Transition:** Connects 4" and 3" ducts effortlessly for perfect airflow integration
- • **Maximized Airflow Efficiency:** Engineered to maintain optimal ventilation performance and energy savings

## Overview

This 4" x 3" galvanized sheet metal duct reducer and increaser is a robust HVAC fitting designed to seamlessly connect ducts of different diameters. Crafted from high-quality galvanized steel, it ensures durability and corrosion resistance while optimizing airflow in heating, cooling, and ventilation systems. Its crimped design allows for easy installation with flexible or rigid ducts, making it an essential upgrade for efficient, professional-grade ductwork.

## Description

Full description not available

## Features

- ✅ 𝐃𝐔𝐂𝐓 𝐑𝐄𝐃𝐔𝐂𝐄𝐑 & 𝐈𝐍𝐂𝐑𝐄𝐀𝐒𝐄𝐑: Sheet metal HVAC Duct Reducer for flexible or metal HVAC Ducts and air vents. Used to connect two air ducts of different diameters to create a seamless ventilation system duct. Sturdy steel ducting is perfect for DIY and Trade use. This is a very practical duct, all in one, solid duct which can be used when connecting two different, solid or flexible ducts or ducts to ventilators, or vice versa, from small to large, larger too small.
- ✅ 𝐇𝐈𝐆𝐇-𝐐𝐔𝐀𝐋𝐈𝐓𝐘 𝐌𝐄𝐓𝐀𝐋 𝐒𝐇𝐄𝐄𝐓: Our sheet metal reducers and increasers are manufactured from the highest quality of galvanized steel. Perfect for use with either flexible duct or rigid sheet metal duct. Never be restricted to your air conditioner's ducting requirements again. Once it's in position can be sealed with duct sealer.
- ✅ 𝐄𝐗𝐓𝐑𝐀 𝐒𝐓𝐑𝐄𝐍𝐆𝐓𝐇 𝐀𝐍𝐃 𝐅𝐈𝐓𝐓𝐈𝐍𝐆𝐒: These galvanized duct reducers can be used with fans, ducting, air-cooled hoods, and ventilation systems, that allowing you to lengthen and extend your ducting. This duct is crimped on the small end of the duct to fit inside the next ducting section. They are the perfect sheet metal fitting for changing duct sizes and utilized for maintaining the best airflow for maximum efficiency in your HVAC duct system.
- ✅ 𝐄𝐀𝐒𝐘 𝐓𝐎 𝐈𝐍𝐒𝐓𝐀𝐋𝐋: Consider these reducers as a patch between your current unit and the ducting you want to run and see how easy it is to match up the two. They are the perfect sheet metal fitting for changing duct sizes and utilized for maintaining the best airflow for maximum efficiency in your HVAC duct system. Perfect for use with either flexible duct or rigid sheet metal duct. The connection can be fastened by using montage glue, tape, or steel clips.
- ✅ 𝟏𝟎𝟎% 𝐆𝐔𝐀𝐑𝐀𝐍𝐓𝐄𝐄 𝐒𝐀𝐓𝐈𝐒𝐅𝐀𝐂𝐓𝐈𝐎𝐍: We are willing for the satisfaction of our customers because customer satisfaction is our first priority. If you have any kind of problem regarding our product we will fully co-operate in solving your problem. You should never feel any hesitation in contacting us. Do not miss the opportunity, simply click “ADD TO CART” to order yours today!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | The Sheet Metal Kid |
| Part Number | 5843 |
| Item Weight | 5 ounces |
| Product Dimensions | 7 x 6 x 7 inches |
| Item model number | 5843 |
| Is Discontinued By Manufacturer | No |
| Size | 4X3 |
| Color | Silver |
| Finish | Galvanised |
| Material | Galvanised Metal |
| Shape | Round |
| Number Of Pieces | 1 |
| Batteries Included? | No |
| Batteries Required? | No |

## Images

![4" X 3" Duct Reducer & Increaser Non-Crimped Single Wall Galvanized Sheet Metal ducting Connector for Airflow, Heating, Cooling, & air Ventilation Systems Fittings - Image 1](https://m.media-amazon.com/images/I/71-GxUYJBcL.jpg)
![4" X 3" Duct Reducer & Increaser Non-Crimped Single Wall Galvanized Sheet Metal ducting Connector for Airflow, Heating, Cooling, & air Ventilation Systems Fittings - Image 2](https://m.media-amazon.com/images/I/71YvtpmqkLL.jpg)
![4" X 3" Duct Reducer & Increaser Non-Crimped Single Wall Galvanized Sheet Metal ducting Connector for Airflow, Heating, Cooling, & air Ventilation Systems Fittings - Image 3](https://m.media-amazon.com/images/I/71H3OmK8QsL.jpg)
![4" X 3" Duct Reducer & Increaser Non-Crimped Single Wall Galvanized Sheet Metal ducting Connector for Airflow, Heating, Cooling, & air Ventilation Systems Fittings - Image 4](https://m.media-amazon.com/images/I/71VlmCmfx8L.jpg)
![4" X 3" Duct Reducer & Increaser Non-Crimped Single Wall Galvanized Sheet Metal ducting Connector for Airflow, Heating, Cooling, & air Ventilation Systems Fittings - Image 5](https://m.media-amazon.com/images/I/71nnT3bJHPL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Perfect Fit
*by R***R on May 3, 2023*

This was a perfect fit for my portable dryer

### ⭐ not as pictured overpriced
*by K***Y on May 1, 2020*

if you are looking for an improved design with a gradual reduction rather than abrupt which should result in less turbulence and decreased noise as I did please be advised the product pictured is not what will be delivered.The product delivered is available elsewhere with abrupt is available on Amazon for less. I planned on returning but to place the project on hold is not worth the hassle. Buyer beware

### ⭐⭐⭐⭐⭐ Five Stars
*by F***R on September 27, 2017*

Fit right

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.bo/products/74280170-4-x-3-duct-reducer-and-increaser-non-crimped-single](https://www.desertcart.bo/products/74280170-4-x-3-duct-reducer-and-increaser-non-crimped-single)

---

*Product available on Desertcart Bolivia*
*Store origin: BO*
*Last updated: 2026-02-12*