SKU: 51294583617

Robbox - Length Extension - 16"

$93.22 $103.58
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Ships within 48 hours · Estimated delivery Jul 14 - Jul 19

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Description

Robbox - Length Extension - 16"The Robbox Length Extension is a box beam level extension designed to expand the working length of your Sennses Pro Device in seconds. Available in multiple sizes, the extensions are precision machined on three surfaces and features magnetic removable end caps and a secure magnetic latching system that locks the Sennses Pro in place. Optional thumbscrew is also included for added security. The top surface is uninterrupted for easy marking, and

The Robbox Length Extension is a box beam level extension designed to expand the working length of your Sennses™ Pro Device in seconds. Available in multiple sizes, the extensions are precision-machined on three surfaces and features magnetic removable end caps and a secure magnetic latching system that locks the Sennses™ Pro in place. Optional thumbscrew is also included for added security. The top surface is uninterrupted for easy marking, and features an imperial scale. A metric scale can be found on the bottom. Two precision calibrated bubble vials for level and plumb are incorporated for use without the Sennses Pro digital measuring device for added versatility.

Key Features

Quick and Easy Installation: Equip the Sennses Pro into the Length Extension in seconds with the positioning baseplate and magnets.

3-Surface Machined Body: Achieve unmatched precision and accuracy with three machined surfaces to use for your leveling applications.

Removable Magnetic End Caps: Remove end caps quickly and easily. Protects Extension frame and provides access to tight spaces.

Precision-Calibrated Bubble Vials: Gain enhanced flexibility with integrated bubble-level vials.

Imperial and Metric Ruler Markings: Take quick measurements quickly and easily with the uninterrupted imperial and metric ruler markings on the top and bottom surfaces, respectively.

Special Features

- Three-Surface Machined Aluminum Body for Ultimate Precision
- Removable Magnetic End Caps
- Three-Way Calibrated Bubble Vials for Added Versatility
- Magnetic Latching System with Optional Thumbscrew

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 51294583617

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4.6 ★★★★★
Based on 1509 reviews
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Verified Purchase
Mr. & Mrs. Us
Los Angeles, US
★★★★★ 5
Affordable, Clean and does the job.
Size: 36 sqft, Size: 36 sqft
I consumed about 90% of this box doing all doors and the tailgate on a 2000 tahoe. I applied it very liberally inside every door (exteror) panel. We then added an almost equal amount of deadening/absorbing/decoupling foam to the other side of the door (panel side). If you know how many rattles a circa 2000 tahoe GMT800 can have by now, you can appreciate why I added this as a "must" if i were to put some money back into this vehicle. Best sub $150 spent on this mini resto so far, right next to tint. Good quality. Not to thick or thin. Good sized sheets. Seamed to deaden as good as another slightly thicker material i recently used in my F250. My box was delivered with no issues of melting or anything funky. Clean, no major smell before or after and easy to work with. Maybe buy a roller set and wear gloves. Save your hands if your doing inside of panels. Good buy. Will buy more for future projects.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 17, 2026
T
Verified Purchase
Todd G. Teiken
Draper, US
★★★★★ 5
Great product
Size: 36 sqft
Easy to apply, made a big difference in sound deadening on side by side. Would definitely purchase again.
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Reviewed in the United States on June 1, 2026
B
Verified Purchase
B. Billy
Belleville, US
★★★★★ 5
AS GOOD AS ANY OTHER, WORKS GREAT
Size: 36 sqft, Size: 36 sqft
Used this in my 17 RAM 1500. This stuff works great, just as good as S...ss brand that is also sold on here. Same thickness and same tackiness. And this stuff sticks like crazy, once its laid down and rolled onto the surface, it is hard to remove, so I am pretty sure it will stay where I installed it. It is great value, one box was enough to do the whole roof of the truck with a little left over for small spots. I think it took a total of 2.5 boxes to do my whole crew cab, roof, floor and back wall and most of the firewall, and I also added a layer of their .25" foam. I do notice a difference in less outside noise, from wind and road. I will be doing my wife car soon, and this is the product I will be using again, I recommend this.
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Reviewed in the United States on January 14, 2026
A
Verified Purchase
AF_TX
Alexandria, US
★★★★★ 5
Dyna... who?
Size: 36 sqft
This stuff works great. Fraction of the cost to Dyna.. and just as good. Very sticky. Used in doors, floors and ceiling. Great product and performs flawlessly. I would highly recommend this.
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Reviewed in the United States on March 13, 2026
J
Verified Purchase
Jacob C. Hall
Chelsea, US
★★★★★ 4
Awesome, inexpensive alternative to name-brands!
Size: 36 sqft
Awesome. Stuck well with alcohol prep and time to let liquid flash-off. Very consistent, piece to piece. Backing peeled easily when desired. Compared to Amazon Basics, the butyl seemed a little thicker (infinitesimally) and stickier, foil was less thick than Amazon Basics. Very good value. Started with my nice car, but after completing project, sound dampened all cars in the immediate family it made such a noticeable difference in sound level and quality of music from soeakers. Recommended!
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Reviewed in the United States on October 21, 2025

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