# HOXWELL NBTS578H-4 RV Jack Blocks, 6-Inch, 4-Pack

Pack: HOXWELL NBTS578H-4 RV jack blocks are a four-piece, stackable set intended for trailer jacks and stabilizers. The listing describes a 6-inch height and a carrying bag, making the set relevant for RV owners who want portable support blocks, while the stated load figures need clarification before use.

- [Original product page](https://best-deals.pro/product/hoxwell-nbts578h-4-rv-jack-blocks)
- [View offer](https://best-deals.pro/visit/hoxwell-nbts578h-4-rv-jack-blocks)
- Market: US
- Language: en-US
- Currency: USD
- Brand: HOXWELL
- Model: NBTS578H-4
- Category: Cars & Motorcycles > Vehicle Accessories
- Price: 63.99 USD
- Previous price: 79.99 USD
- Discount: 20%
- Price checked: 2026-11-14T05:41:07.205Z
- Rating: 4.8 / 5
- Reviews: 143

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- The listing says the blocks stack to adjust height for uneven surfaces.
- Described for tongue jack feet, wheel jacks, fifth-wheel jack feet and scissor stabilizers.
- Side hole and rope are described as carry features, with a storage bag for stowing the set.

## Pros

- Stackable construction allows height adjustment using the blocks supplied in the set.
- The broad stated jack and stabilizer compatibility may suit owners with different support styles.
- The listed side hole, rope and storage bag support carrying and storage.

## Specifications

### Identity
- Brand: HOXWELL
- Model: NBTS578H-4
### Dimensions and installation
- Dimensions listed: 11.6 x 11.6 x 6 inches
- Minimum height: 6 inches
- Stackable: Each RV jack block features a stackable design
### Materials and protection
- Material listed: Plastic
- Construction claim: high-performance polymer and added anti-UV aging additives
### Use and capacity claims
- Vehicle type: RV
- Fit type: Universal Fit
- Load capacity listed: 10000 Pounds
- Per-block gross vehicle weight claim: G.V.W 40000 Lbs per block

## Before you buy

- The listing is contradictory on capacity: specifications say 10000 Pounds, while feature text claims G.V.W 40000 Lbs per block. It also alternates between 11.6-inch dimensions and about 11.5 inches, and claims a 4-piece set in the title while the contents field only names a Trailer Jack Block. Confirm the applicable load rating and selected set contents before buying or loading. These are listing inconsistencies, not established product defects.

## In the box

- Trailer jack blocks, set described as 4 pieces (Check selected pack): The title claims four pieces, but the contents field lists only a Trailer Jack Block. Check the selected listing.
- Storage bag (Check selected pack): Mentioned in the product title and feature text, but not in the included-components field.

## A good fit for

- RV and travel-trailer owners seeking stackable blocks for jack feet or stabilizers.
- Buyers who want carrying and storage features alongside a portable block set.

## Less suited to

- Buyers who need a confirmed load limit before selecting a support block, until the conflicting capacity claims are clarified.

## Customer feedback

Customer feedback describes the blocks as sturdy and easy to use, with positive comments about quality, function, portability and value. Those impressions are relevant to a portable stackable set, but they do not settle the listing's conflicting load-capacity claims or establish how a particular setup will perform.
- Positive themes: Customers report sturdy construction and a stable base.
- Positive themes: Feedback mentions quality, functionality and ease of setup.
- Positive themes: Customers appreciate that the blocks are not too heavy and see them as worth the price.

## Frequently asked questions

### How many blocks are in the set?
The title describes a four-piece set, but the included-components field names only a Trailer Jack Block. Confirm the selected listing's package contents.
### What is the stated load capacity?
The specifications list 10000 Pounds, while feature text says G.V.W 40000 Lbs per block. Those claims conflict, so confirm the applicable rating before use.
### Can the blocks be stacked?
Yes. The listing describes a stackable design for adjusting height, including on uneven surfaces.
### What types of RV supports are they described for?
The listing claims compatibility with tongue jack feet, wheel jacks, fifth-wheel jack feet and scissor stabilizers. Check fit for your specific support.

## Alternative options

- [HOXWELL 8''High RV Trailer Jack Block with Handle, RV Stabilizer Blocks for Any Tongue Jack, Post, Foot, Round Square or Scissor Stabilizer, Stackable & Portable, 1 Pack, Orange](https://best-deals.pro/visit/hoxwell-nbts578h-4-rv-jack-blocks)
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## Add-ons

- [RVGUARD RV Water Pressure Regulator Valve, CSA Approved, Lead-Free Brass \| Adjustable Water Pressure Reducer with Gauge, With](https://best-deals.pro/visit/hoxwell-nbts578h-4-rv-jack-blocks)
- [HOXWELL RV Trailer Jack Block with Bag, Camper Stabilizer Blocks for Travel Trailer, Use for Any Tongue Jack, Post, Foot, 5th](https://best-deals.pro/visit/hoxwell-nbts578h-4-rv-jack-blocks)

## Images

![HOXWELL NBTS578H-4 RV Jack Blocks, 6-Inch, 4-Pack — 1](https://best-deals.pro/i/EBIuVr4vnVFLA-eG6CB3x8WgShLFri8xiiyXYX_f_nuu-fCMXHRicpxfIPXFVtRJox6pkB77orGB0JjUrDteOAo2NhPKbSUfDMZJg5cp0R0hs1oSO39fV2iD.jpg)

![HOXWELL NBTS578H-4 RV Jack Blocks, 6-Inch, 4-Pack — 2](https://best-deals.pro/i/kANLd1uysJHEN6C-arSu5PgVxomyDse5kxaIUhwNdP0GNY3OJdh5_nmNfcXoA9wdWn_ywhBDXS-FowA10Tpwb7Qlh2bf-HYE6x5-rMcAj4egOgpEDnQlYxY-.jpg)

![HOXWELL NBTS578H-4 RV Jack Blocks, 6-Inch, 4-Pack — 3](https://best-deals.pro/i/hZgH-y5WIoULzglYvaVQP5UHdTLembb9vy0-LajXreY9xEUtud4vVRwp9LwpxTZ10uvSWQld4L6jPkCsKZV-nhKfxtu8U2ddNICAQnVSQwk_W01wAY_Yexjs.jpg)

![HOXWELL NBTS578H-4 RV Jack Blocks, 6-Inch, 4-Pack — 4](https://best-deals.pro/i/ruJM4I0TJgnDCwu3v948wKHY4lSnQmWWLGpe8n3lvyhwexaaohUja20dYqV8q7bJSpT3QcEItBu2v_mG5k2pUa4TjgXraQBMsUroLgvRLNEHp0pRhyNwG4V8.jpg)

![HOXWELL NBTS578H-4 RV Jack Blocks, 6-Inch, 4-Pack — 5](https://best-deals.pro/i/n368mnHprD6JvGwzSPtB7gGUWJ_CBzDpj1KLs8iFLayjb6nGq4XWRFWOD0nEkoU3ZwV6HosfxEzSQ6fcE7O0C7N1Vdpn1lYoiW7DVzahlNJiq2ToP-oN9V7E.jpg)

![HOXWELL NBTS578H-4 RV Jack Blocks, 6-Inch, 4-Pack — 6](https://best-deals.pro/i/ZxBEMTYCNnX9G3wMsHuBl_KSX4iyvqXps0_KSfQdX-7Tc7pkuf2tJb2iN0xGG4saRKvapzXWaxHkIQGm0XANJNkwbUzvaoHLbg4u3Jt8nHLecIY_q5V4E3h_.jpg)

![HOXWELL NBTS578H-4 RV Jack Blocks, 6-Inch, 4-Pack — 7](https://best-deals.pro/i/dC35Dx6YkBIqD2It49aAwSoeFQVrgc1Y0k0nd3ndX9Q1uNTgtPl1tpq8gX6iH2eMrikkWPCjnDhfmak6xn7Lmi6N0IpKJ6-U_CQ1_O8GQt9vNllVvVNOckLH.jpg)