ROBLOCK 6''H Trailer Jack Block with Bag, RV Camper Stabilizer Blocks for Travel Trailer, Suit for Any Tongue Jack, Post, Foot, 5th Wheels, Round Square or Scissor Stabilizer, 1 Pack
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FREE refund/replacement until Jan 31, 2026
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Availability:
In Stock.
Arrives
Saturday, Mar 28
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Color: 578H-6''H
Features
- Sturdy & Robust: Our RV trailer jack blocks are built with a high-performance polymer and added anti-UV aging additives to resist dirt, grime and oil for years of rugged use. G.V.W 40000 Lbs per block
- Widely Used: The trailer jack block supports nearly any tongue jack foot, wheel jacks, 9 round 5th wheels hydraulic jack foot or Scissor Stabilizer and more! ELIMINATES NEARLY ALL MOVEMENT AND SWAY in parked RV's and Trailers
- Adjustable Height: Each RV jack block features a stackable design, allowing you to easily adjust the height according to your needs. This flexibility ensures that you can achieve the perfect leveling for your camper, even on uneven surfaces
- Easy to Carry & Store: The hole on the side of the block and the rope are easy to carry, with storage bag is convenient to store and saving space
- Size & Service: About 6" tall, L:11.5", W:11.5". If you have any questions after purchase, please contact us at first, we will glad to help you solve the problem
Vehicle Service Type: RV, Trailer
Material: Plastic
Load Capacity: 10,000 GVW
Brand: ROBLOCK
Color: 578H-6''H
Load Capacity: 10,000 GVW
Brand: ROBLOCK
Color: 578H-6''H
Item dimensions L x W x H: 11.6 x 11.6 x 6 inches
Style: Scissor
Automotive Fit Type: Universal Fit
Manufacturer: ROBLOCK
Model: RBTS578H
Item Weight: 4.66 pounds
Product Dimensions: 11.6 x 11.6 x 6 inches
Item model number: RBTS578H
Manufacturer Part Number: RBTS578H
Date First Available: December 26, 2024
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Saturday, Mar 28
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Similar Products
Top Amazon Reviews
Color: 578H-6''H 4PCS
Works great and very sturdy. Also has slots for the frame jacks to sit in.
Reviewed in the United States on November 2, 2025 by Kenny Privette
Color: 578H-6''H 4PCS
I got these 6" blocks to replace 6x6 wood blocks. I wanted to keep the same height but I also wanted to reduce weight. These blocks do both while still storing in the same space. They weigh a bit more than the 3.35 lb (13.4 lb for 4) the web page says. The box they arrived in said the Net Weight was 15.4 lb and my digital scale showed 15.8 lb for 4 or 3.95 lb each. For comparison, my 4 wood blocks weighed 26.8 lb. These blocks can be stacked to gain extra height if needed but each additional one only gives an extra 3" of lift. But this is great when storing them because all four can be nested together in a stack that is only 15" high. The semi-open bottom 11.5" diameter footprint should be large enough to provide good stability and hopefully doesn't sink into soft ground. These blocks feel very sturdy and the UV stabilized recycled plastic should hold up for a long time. I think two blocks could be stacked with the bottoms together so that they provide 12" of lift but the stability will probably be compromised. The cord out the side and the finger holes on the other side should make these easy to place under the stabilizer jacks of our travel trailer and retrieve when it's time to go. I don't expect to ever get anywhere near 10,000 lb loads on these so they should hold up fine in that area. These blocks also appear to be identical in every way to the Hoxwell blocks listed here on the A. I'll update this review after we get back from our next trip where they should be used at 40 or so campgrounds. That will certainly uncover all the good, bad and ugly. Check back in Nov 2025 for the update.
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Reviewed in the United States on July 1, 2025 by David in Florida
Color: 578H-6''H
Great for our horse trailer and horse camper trailer. Substantial and lightweight. One we keep at home for day trailering because we always detach at the same place. The other we take with us on our camping trips. Very light, sturdy, very strong. Love this thing.
Reviewed in the United States on June 12, 2025 by scf
Color: 578H-6''H
They seem strong enough for the job and lightweight which is a bonus.
Reviewed in the United States on November 7, 2025 by James R.
Color: 578H-6''H 4PCS
They work as they should. However the storage bag ripped the first time we used it.
Reviewed in the United States on August 28, 2025 by Lu
Color: 578H-6''H
This works great for replacing the wood block I was using. Much lighter and compact. It is heavy duty and well constructed. Supports my camper tongue jack without any issues. Great product at a reasonable price.
Reviewed in the United States on June 1, 2025 by Mark H
Color: 578H-6''H 4PCS
I bought these to put under the stabilizers on my camper. These worked perfect and got the stabilizer pads off the ground so I dont have to worry about the stabilizers getting dirty or rust.
Reviewed in the United States on October 17, 2025 by Danny
Color: 578H-6''H 4PCS
Provides a super solid platform. Have six. One for each stabilizer, the hitch and an extra stabilizer we manually set up depending on the region. Rope handles on each are great. These are larger and take up a decent amount of space in storage but well worth it from a stability standpoint.
Reviewed in the United States on December 15, 2025 by HarborSusans