---
product_id: 108496766
title: "189030 - 4\" x 5/8\"-11 Knot Cup Brush, .020 Carbon Steel Wire"
brand: "mercer industries"
price: "€ 38.90"
currency: EUR
in_stock: true
url: https://www.desertcart.nl/products/108496766-189030-4-x-5-8-11-knot-cup-brush-020
store_origin: NL
region: Netherlands
---

# 5/8" Arbor Max RPM 9,000 4" Diameter 189030 - 4" x 5/8"-11 Knot Cup Brush, .020 Carbon Steel Wire

**Brand:** mercer industries
**Price:** € 38.90
**Availability:** ✅ In Stock

## Summary

> Brush Away the Competition! 🧹

## Quick Answers

- **What is this?** 189030 - 4" x 5/8"-11 Knot Cup Brush, .020 Carbon Steel Wire by mercer industries
- **How much does it cost?** € 38.90 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/108496766-189030-4-x-5-8-11-knot-cup-brush-020)

## Best For

- mercer industries enthusiasts

## Why This Product

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

## Key Features

- • **Wide Coverage:** Cup design ensures maximum surface area for efficient cleaning.
- • **Unleash Your Power:** Transform your angle grinder into a rust-busting machine!
- • **Aggressive Brushing:** Perfect for tackling tough jobs like rust and scale removal.
- • **Durable Construction:** .020 Carbon Steel wire for long-lasting performance.
- • **Not for Stainless Steel:** Specialized for ferrous materials only.

## Overview

The 189030 Knot Cup Brush is a 4" diameter tool designed for aggressive brushing on tough surfaces. With a 5/8" arbor and a maximum RPM of 9,000, this brush is made from durable .020 Carbon Steel wire, making it ideal for rust and scale removal, though not recommended for stainless steel applications.

## Description

The Mercer Industries Knot Cup Brush provides excellent abrasion and wear resistance along with high flexing action. It has superior rotational balance which helps reduce operator fatigue and improves tool life. Solid ring construction ensures the industrial wire wheel to run smoother and longer with less vibration. This industrial wire brush is made from high quality steel. Mercer Industries is a 3rd generation family owned company that was built on core values of Quality, Performance, Delivery, Service, and Price. Founded in 1968, Mercer Industries offers more than 3,000 products for the flooring, industrial, automotive and welding markets. Mercer, formerly known as Mercer Abrasives, is committed to serving its customers and providing quality products. For more information, visit mercer industries dot com. We're here to support you. Please contact our team at info at mercer industries dot com with questions or comments. Claims for warranty must be made within 90 days of the date of purchase. Proof of purchase required. This warranty does not cover any product that has been subject to misuse, neglect, negligence or accident, or that has been used in any way contrary to the purpose intended.

## Features

- 1- 4" diameter Knot Cup Brush with a 5/8"-11 arbor.
- Use on an Angle Grinder. Max RPMs 9,000
- Knot wire is good for aggressive brushing for tough jobs like rust and scale removal. Cup brushes are good for flap surfaces because they cover more area.
- Made with .020 Carbon Steel wire - the most common type of wire
- Not recommended for stainless steel

## Product Details

- **Material:** Carbon Steel
- **Brand:** Mercer Industries
- **Grit Material:** Carbon Steel,Steel
- **Bristle Type:** Crimped Wire
- **Color:** .020 Carbon Steel

## Images

![189030 - 4" x 5/8"-11 Knot Cup Brush, .020 Carbon Steel Wire - Image 1](https://m.media-amazon.com/images/I/61djpRJeXHL.jpg)
![189030 - 4" x 5/8"-11 Knot Cup Brush, .020 Carbon Steel Wire - Image 2](https://m.media-amazon.com/images/I/71nDeUiJ4ML.jpg)
![189030 - 4" x 5/8"-11 Knot Cup Brush, .020 Carbon Steel Wire - Image 3](https://m.media-amazon.com/images/I/61hA7bBJ33L.jpg)
![189030 - 4" x 5/8"-11 Knot Cup Brush, .020 Carbon Steel Wire - Image 4](https://m.media-amazon.com/images/I/71fnLjGB97L.jpg)
![189030 - 4" x 5/8"-11 Knot Cup Brush, .020 Carbon Steel Wire - Image 5](https://m.media-amazon.com/images/I/61C2NN3TapL.jpg)

## Available Options

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

## Questions & Answers

**Q: Is this made from stainless steel like the listing says?**
A: The wires are .020 stainless steel

**Q: What does this remove?**
A: I used it to clean bricks, pavers, and also removes paint from most any surface.

---

## 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.nl/products/108496766-189030-4-x-5-8-11-knot-cup-brush-020](https://www.desertcart.nl/products/108496766-189030-4-x-5-8-11-knot-cup-brush-020)

---

*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-01-23*