---
product_id: 430381168
title: "4-Pack OX BLOX MAXX Heavy Duty Trailer Jack Block - 10.5x10.5x4.5 Inches - 6.8 lbs Weight - 5th Wheel RV Jack Block for 9\" Round Feet - 9\" and Smaller Feet Nest Securely Within Ridges"
brand: "ekon"
price: "€ 500.03"
currency: EUR
in_stock: true
reviews_count: 8
url: https://www.desertcart.it/products/430381168-4-pack-ox-blox-maxx-heavy-duty-trailer-jack-block
store_origin: IT
region: Italy
---

# 10.5x10.5x4.5 inch compact size UV-resistant recycled plastic 10,000 lbs load capacity 4-Pack OX BLOX MAXX Heavy Duty Trailer Jack Block - 10.5x10.5x4.5 Inches - 6.8 lbs Weight - 5th Wheel RV Jack Block for 9" Round Feet - 9" and Smaller Feet Nest Securely Within Ridges

**Brand:** ekon
**Price:** € 500.03
**Availability:** ✅ In Stock

## Summary

> 🛻 Lock in your RV’s stability with the MAXX power block!

## Quick Answers

- **What is this?** 4-Pack OX BLOX MAXX Heavy Duty Trailer Jack Block - 10.5x10.5x4.5 Inches - 6.8 lbs Weight - 5th Wheel RV Jack Block for 9" Round Feet - 9" and Smaller Feet Nest Securely Within Ridges by ekon
- **How much does it cost?** € 500.03 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/430381168-4-pack-ox-blox-maxx-heavy-duty-trailer-jack-block)

## Best For

- ekon enthusiasts

## Why This Product

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

## Key Features

- • **Compact Convenience:** Short 4.5" height fits perfectly under stabilizer jacks, easier than bulky bucket blocks.
- • **Heavy-Duty Strength:** Supports up to 10,000 lbs, engineered for the toughest RV and trailer setups.
- • **Unmatched Stability:** Patent-pending ridged design locks 9" round jack feet securely, eliminating sway and movement.
- • **Optimized Surface Grip:** Webbed bottom design maximizes ground contact for superior stability on any terrain.
- • **Eco-Friendly Durability:** Made in the USA from UV-resistant recycled plastic, built to last season after season.

## Overview

The EKON 4-Pack OX BLOX MAXX Trailer Jack Blocks are engineered in the USA with a patent-pending design to securely fit 9" round jack feet. Each block measures 10.5x10.5x4.5 inches, weighs 6.8 lbs, and supports up to 10,000 lbs. Made from UV-resistant recycled plastic, these blocks provide superior stability and durability for 5th wheel RVs and trailers, reducing sway and movement with a unique ridged and webbed base design.

## Description

Full description not available

## Features

- 4 blocks. Keep your RV stable, eliminating most movement and sway with the strongest jack blocks on the market. Unique design provides the most stability and strength.
- Perfect fit for 9" large round jack feet found on many 5th wheels and other RVs. The corner ridges keep the foot secure and stable. The shorter height (4.25") make them convenient for stabilizer jacks, compared to the bucket block.
- 10,000 lbs. capacity. The larger surface area created by the web design on the bottom of the block is a more stable surface area than alternative blocks.
- Size: Recessed pad area is a 9.25" circle with a 5.25" gap between ridges. The block is 10.5x10.5x4 and weighs 6.8 lbs. The block is made in the USA of UV-resistant recycled plastic.
- Patent pending design by American engineers. These heavy duty blocks are made the old fashioned way, and are built to last.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | EKON |
| Brand | EKON |
| Item Weight | 29 pounds |
| Package Dimensions | 19 x 13 x 13 inches |
| Manufacturer Part Number | EKJS-MAXX-cs4 |

## Product Details

- **Load Capacity:** 10000 pound
- **Brand:** EKON
- **Color:** Black
- **Manufacturer:** EKON
- **UPC:** 860007379758

## Images

![4-Pack OX BLOX MAXX Heavy Duty Trailer Jack Block - 10.5x10.5x4.5 Inches - 6.8 lbs Weight - 5th Wheel RV Jack Block for 9" Round Feet - 9" and Smaller Feet Nest Securely Within Ridges - Image 1](https://m.media-amazon.com/images/I/71pzeiTi7GL.jpg)

## Available Options

This product comes in different **Item Package Quantity** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Solid
*by B***H on May 18, 2025*

Works great for travel trailer.

### ⭐⭐⭐⭐⭐ Great so far
*by G***G on March 18, 2025*

I've been impressed considering it is a block. I have had them a little of over a year, used frequently in the winter, and they do the trick with no signs of breakage.

### ⭐⭐⭐⭐⭐ Best ever
*by H***L on December 5, 2024*

This is the second block I’ve purchased. Loved both of them and highly recommend! First one, the tailgate dropped down and out it went! Had to purchase another and I’m so happy I did!

## Frequently Bought Together

- 4-Pack OX BLOX MAXX Heavy Duty Trailer Jack Block - 10.5x10.5x4.5 Inches - 6.8 lbs Weight - 5th Wheel RV Jack Block for 9" Round Feet - 9" and Smaller Feet Nest Securely Within Ridges
- EKON 4-Pack RV Jack Stabilizer Pads 12x12x0.75 - Slip-Resistant RV Jack Pads - Rubber Levelers for Campers and Trailers - Prevents Sinking and Aids in Stabilizing
- OX BLOX Ultra Trailer Jack Block - Universal RV Leveling Blocks - Durable & Stackable - For All Jack Types - 100% Recycled Plastic - Works For Class A Motorhomes

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**Shop now:** [https://www.desertcart.it/products/430381168-4-pack-ox-blox-maxx-heavy-duty-trailer-jack-block](https://www.desertcart.it/products/430381168-4-pack-ox-blox-maxx-heavy-duty-trailer-jack-block)

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*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-01-30*