---
product_id: 1782450
title: "89661-PRO Automotive R134a 2-Way Manifold Gauge Set with 3-in-1 Can Tap Valve – U.S. Designed, Assembled, and Tested – Includes 60\" Hoses and Manual Couplers"
brand: "mastercool"
price: "8960093₫"
currency: VND
in_stock: true
reviews_count: 9
category: "Mastercool"
url: https://www.desertcart.vn/products/1782450-89661-pro-automotive-r134a-2-way-manifold-gauge-set-3
store_origin: VN
region: Vietnam
---

# 2.5" recalibratable silicone-dampened gauges Durable extruded aluminum block 100% US designed & tested 89661-PRO Automotive R134a 2-Way Manifold Gauge Set with 3-in-1 Can Tap Valve – U.S. Designed, Assembled, and Tested – Includes 60" Hoses and Manual Couplers

**Brand:** mastercool
**Price:** 8960093₫
**Availability:** ✅ In Stock

## Summary

> ❄️ Master Your A/C Game with Precision & Power!

## Quick Answers

- **What is this?** 89661-PRO Automotive R134a 2-Way Manifold Gauge Set with 3-in-1 Can Tap Valve – U.S. Designed, Assembled, and Tested – Includes 60" Hoses and Manual Couplers by mastercool
- **How much does it cost?** 8960093₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/1782450-89661-pro-automotive-r134a-2-way-manifold-gauge-set-3)

## Best For

- mastercool enthusiasts

## Why This Product

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

## Key Features

- • **Built to Endure:** Rugged aluminum block with free-floating piston valves for extended tool life and minimal maintenance.
- • **Ready for the Road:** Compact, blow-molded carrying case keeps your professional-grade manifold set organized and portable.
- • **Leak-Free Confidence:** Premium manual R134a couplers ensure secure, efficient refrigerant recovery and charging without mess.
- • **All-in-One Versatility:** Includes three 60" SAE-approved nylon hoses plus a 3-in-1 side mount can tap valve for ultimate compatibility.
- • **Precision You Can Trust:** Silicone-dampened 2.5" gauges deliver stable, flutter-free readings for flawless diagnostics every time.

## Overview

The Mastercool 89661-PRO is a professional-grade R134a manifold gauge set designed and assembled in the USA, featuring a durable extruded aluminum block, recalibratable 2.5" silicone-dampened gauges for accurate pressure readings, and premium leak-free couplers. Complete with three 60" SAE-approved hoses, a versatile 3-in-1 can tap valve, and a rugged carrying case, it’s engineered for long-lasting reliability and efficient automotive A/C diagnostics and servicing.

## Description

Mastercool 89661-PRO Product Description Mastercool 89661-PRO Automotive R134a 2-Way Manifold Gauge SetThe Mastercool 89661-PRO is a professional-grade manifold gauge set designed for precision and durability when servicing R134a automotive A/C systems. Constructed with a heavy-duty extruded aluminum block, this set withstands frequent use in **demanding environments**, making it an **essential tool for technicians and serious DIYers**.✔ Built for Long-Lasting PerformanceHeavy-Duty Aluminum Manifold Block – Provides **exceptional strength and durability**, ensuring **consistent performance** over time.Free-Floating Piston Valves – Reduces **O-ring wear**, improving **longevity** and minimizing **maintenance requirements**.Silicone-Dampened 2.5" Recalibrateable Gauges – Offers **stable and accurate readings**, reducing **needle flutter** for **precise diagnostics**.✔ Complete Set for Versatile A/C ServicingPremium Manual R134a Couplers – Ensures **secure, leak-free connections** for **efficient refrigerant recovery and charging**.Three 60" SAE-Approved Nylon Barrier Hoses – Designed for **maximum flexibility and durability**, meeting **industry standards for safe refrigerant handling**.3-in-1 Side Mount Can Tap Valve – Compatible with **R134a refrigerants and oil charge cans**, adding **versatility** to your toolkit.✔ Enhanced Features for ConvenienceExtra-Large Sight Glass – Provides **instant visual confirmation of refrigerant flow**, making **system diagnostics faster and more efficient**.Blow-Molded Carrying Case – **Durable and portable**, keeping your tools **organized, secure, and easy to transport**.✔ Ideal for Professional & DIY A/C ServicingWhether you're handling **routine maintenance or complex repairs**, the **Mastercool 89661-PRO** delivers **precision, durability, and efficiency** for **automotive A/C diagnostics and service**.Upgrade your A/C servicing capabilities today with the Mastercool 89661-PRO – Engineered for Professionals, Built to Last!

Review: 👍 - Works like it should. Solid construction. Very pleased
Review: DIY automotive AC troubleshooting tool - This is a nice manifold kit for DIY automotive use. The hoses, valves, and connections are all high quality with no apparent leaks. The gauges are easy to read. Great value for the money.

## Features

- ✅ 100% U.S. Designed, Assembled & Tested – Specifically built for R134a automotive A/C systems, this manifold gauge set delivers professional-grade performance, making it ideal for frequent use and long-lasting reliability.
- ✅ Durable Aluminum Block Construction – Designed with a rugged extruded aluminum body, featuring free-floating piston valves that reduce O-ring wear and extend the tool’s lifespan for consistent, long-term performance.
- ✅ Accurate 2.5" Recalibrateable Gauges – Silicone-dampened gauges minimize needle flutter, ensuring precise pressure readings for reliable A/C system diagnostics.
- ✅ High-Quality Manual R134a Couplers – Includes premium manual couplers that provide secure, leak-free connections, ensuring efficient refrigerant recovery and charging for professional results.
- ✅ Complete Hose Set & 3-in-1 Side Mount Can Tap Valve – Comes with three 60” SAE-approved nylon barrier hoses, plus a versatile 3-in-1 side mount can tap valve, offering compatibility with R134a refrigerants and oil charge cans.
- ✅ Extra-Large Sight Glass for Quick Refrigerant Flow Checks – Allows for immediate visual verification of refrigerant movement, making system diagnostics faster and more efficient.
- ✅ Durable Blow-Molded Carrying Case for Portability – The compact, heavy-duty storage case ensures organized storage and easy transport, keeping your manifold gauge set protected and ready for any job.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000TL32E6 |
| Best Sellers Rank | #418,716 in Automotive ( See Top 100 in Automotive ) #260 in Automotive Gauge Sets |
| Brand | Mastercool |
| Customer Reviews | 4.3 4.3 out of 5 stars (118) |
| Date First Available | July 7, 2004 |
| Exterior | Smooth |
| Item Weight | 14.3 ounces |
| Item model number | 89661-PRO |
| Manufacturer | Mastercool |
| Manufacturer Part Number | 89661-PRO |
| Model | 89661-PRO |

## Product Details

- **Brand:** Mastercool
- **Global Trade Identification Number:** 00700376107043
- **Manufacturer:** Mastercool
- **Material:** Aluminum
- **UPC:** 700376107043

## Images

![89661-PRO Automotive R134a 2-Way Manifold Gauge Set with 3-in-1 Can Tap Valve – U.S. Designed, Assembled, and Tested – Includes 60" Hoses and Manual Couplers - Image 1](https://m.media-amazon.com/images/I/81DQjoVUodL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ 👍
*by C***E on December 7, 2025*

Works like it should. Solid construction. Very pleased

### ⭐⭐⭐⭐⭐ DIY automotive AC troubleshooting tool
*by K***H on July 23, 2025*

This is a nice manifold kit for DIY automotive use. The hoses, valves, and connections are all high quality with no apparent leaks. The gauges are easy to read. Great value for the money.

### ⭐⭐⭐⭐ ... used twice and then the high side coupling leaked like a sieve
*by M***I on May 14, 2016*

I initially got these to replace a HF set that i used twice and then the high side coupling leaked like a sieve, the first set of Mastercool gauges i purchased were defective, the needle on the high side gauge looked like a dogs back leg and as a result couldn't be read with any degree of accuracy, i returned them and Amazon expeditiously shipped me a replacement which i received on Sunday and i used them today(Friday ) the set seems well built i like that they fit great just finger tight and don't leak, hopefully the seals will hold up and i will be able to use this set many times, i like the case, i think the gauges will fit back in still attached to the hoses with a bit of wrestling, overall nice item.

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*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-03-09*