---
product_id: 29402549
title: "Caldwell Series 300 Block & Tackle Window Balance – 5/8″ Channel, 27″ Length, Stamp 26-3 (13-19 lbs), Non-Tilt Side-Load Replacement Hardware – Heavy-Duty for Residential & Commercial Windows"
brand: "window repair systems"
price: "727701₫"
currency: VND
in_stock: true
url: https://www.desertcart.vn/products/29402549-caldwell-series-300-block-and-tackle-window-balance-5-8
store_origin: VN
region: Vietnam
---

# Length: 27 inches Includes: Non-winged guides Weight: 8.8 oz Caldwell Series 300 Block & Tackle Window Balance – 5/8″ Channel, 27″ Length, Stamp 26-3 (13-19 lbs), Non-Tilt Side-Load Replacement Hardware – Heavy-Duty for Residential & Commercial Windows

**Brand:** window repair systems
**Price:** 727701₫
**Availability:** ✅ In Stock

## Summary

> 🔧 Elevate Your Windows with Precision and Ease!

## Quick Answers

- **What is this?** Caldwell Series 300 Block & Tackle Window Balance – 5/8″ Channel, 27″ Length, Stamp 26-3 (13-19 lbs), Non-Tilt Side-Load Replacement Hardware – Heavy-Duty for Residential & Commercial Windows by window repair systems
- **How much does it cost?** 727701₫ 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/29402549-caldwell-series-300-block-and-tackle-window-balance-5-8)

## Best For

- window repair systems enthusiasts

## Why This Product

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

## Key Features

- • **Individual Sale:** Sold individually, allowing you to customize your window balance needs.
- • **Durable Construction:** Built to last, this channel block withstands the test of time and use.
- • **User-Friendly Design:** Preinstalled guides make installation a breeze, saving you time and effort.
- • **Precision Engineering:** Crafted for exact measurements, ensuring a perfect fit every time.
- • **Versatile Compatibility:** Designed to work seamlessly with various window types, enhancing your home’s functionality.

## Overview

The 27" Caldwell Series 300 5/8" Channel Block & Tackle Window Balance is a high-quality, precision-engineered solution for your window needs. Weighing just 8.8 ounces and measuring 28 x 0.5 x 0.5 inches, it features preinstalled non-winged guides for easy installation. Sold individually, this durable product is designed to fit various window types, ensuring a perfect balance and functionality.

## Description

27" Caldwell Series 300 5/8" Channel Block & Tackle Window Balance - Stamp 26-3

## Features

- PLEASE NOTE: The Length of the Balance will ALWAYS be 1 Digit HIGHER than the Stamp or SKU Number (example: a balance with a SKU number of 01-3007-1 will be stamped 07-1 and measure 8" in length).
- Includes preinstalled, standard non-winged top and non-winged 1-3/32" bottom guides only. No other parts are included
- To measure the balance, measure the length of the metal channel only. Do not include top and bottom guides when measuring.
- Balances are sold individually
- PLEASE VERIFY MEASUREMENTS AND SASH WEIGHT BEFORE ORDERING

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Caldwell Manufacturing |
| Part Number | 01-30026-3 |
| Item Weight | 8.8 ounces |
| Product Dimensions | 28 x 0.5 x 0.5 inches |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Batteries Included? | No |
| Batteries Required? | No |

## Images

![Caldwell Series 300 Block & Tackle Window Balance – 5/8″ Channel, 27″ Length, Stamp 26-3 (13-19 lbs), Non-Tilt Side-Load Replacement Hardware – Heavy-Duty for Residential & Commercial Windows - Image 1](https://m.media-amazon.com/images/I/31s5at3CSAL.jpg)

## Questions & Answers

**Q: I ordered this and it didn't fit.  my old balancer is stamped 26-3 ca2 cmc 7.  how do i know which one will fit?**
A: If this is the balance that you ordered, it should have worked for your replacement as the balances have the same stamp. Unless the incorrect balance was in the window to start with. If you will measure just the visible glass height that will give you the length that your balance should be.

**Q: Mine is stamped 26-3 ah5 cmc 54?  will this one work?**
A: Yes, that is the replacement for your balance.

**Q: My stamp says 28 6 gu cmc 5 any idea which one i will need?**
A: I think a 29” spring ,   Mine we’re stamped
 26 4 and the 27” product was a perfect match. I think the second number might be about the tension.  I’m just guessing.

**Q: Mine is 2630. which of this should I choose**
A: 26-3 would work as well

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**Shop now:** [https://www.desertcart.vn/products/29402549-caldwell-series-300-block-and-tackle-window-balance-5-8](https://www.desertcart.vn/products/29402549-caldwell-series-300-block-and-tackle-window-balance-5-8)

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*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-03-20*