SKU: 7913145564

RAM Double Ball Mount with Round & Diamond Bases - B Series - Long Arm

Sale price$89.95 Regular price$99.95
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Description

RAM Double Ball Mount with Round & Diamond Bases - B Series - Long ArmRAM B 138U C RAM Double Ball Mount with Round & Diamond Bases B Size Long The RAM B 138U C is a drill down mounting solution pairing a round AMPS base and a diamond AMPS base on a long B Series double socket arm, giving extra reach with near infinite adjustment and two mounting hole options. Key Features Round base with the universal AMPS hole pattern for surface mounting; diamond base with the 2 hole AMPS pattern for lighter device holders Includes

RAM-B-138U-C RAM® Double Ball Mount with Round & Diamond Bases – B Size Long

The RAM-B-138U-C is a drill-down mounting solution pairing a round AMPS base and a diamond AMPS base on a long B Series double socket arm, giving extra reach with near-infinite adjustment and two mounting-hole options.

Key Features

  • Round base with the universal AMPS hole pattern for surface mounting; diamond base with the 2-hole AMPS pattern for lighter device holders
  • Includes one round ball base, one diamond ball base, and a long B Size double socket arm for extended reach
  • Ball-and-socket technology allows near-infinite adjustability and dampens shock and vibration
  • Powder-coated, marine-grade aluminium construction
  • Backed by RAM Mounts' lifetime warranty

Works With

The round base bolts down using the 4-hole or 3-hole AMPS pattern, while the diamond base connects to RAM® and many third-party cradles with the 2-hole AMPS pattern. The 1" B Size balls suit any RAM® holder built for a B Size ball.

Dimensions & Specifications

  • Overall height: 185.7mm (7.31")
  • Arm length: 152mm (6") overall, 134mm (5.25") socket-to-socket
  • Diamond base: 61.7 x 33.3mm (2.43 x 1.31"), 2-hole AMPS 48.6mm (1.912") centre-to-centre
  • Round base: 63.5mm (2.5") diameter; 4-hole AMPS 30 x 38mm, 3-hole AMPS 120° 46.0mm
  • Ball size: 1" rubber ball, B Size
  • Material: powder-coated marine-grade aluminium
  • Weight: 331g (0.73 lbs)
  • Load rating: 907g (2 lbs) standard use, 454g (1 lb) heavy-duty use

What's Included

  • RAM-B-202U round base with 1" ball
  • RAM-B-238U diamond base with 1" ball
  • RAM-B-201U-C long double socket arm for B Size 1" balls

FAQs

Q: What size screws do the base plates take?
A: The AMPS patterns most commonly take #8, #10, M4, or M5 screws. If you're pairing this with a RAM® holder, the holder comes with its own hardware; surface-mount hardware for your own application isn't included.

Installation Video

Watch on YouTube

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: 7913145564

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mmanderson8
Lowell, US
★★★★★ 5
Exactly as described
Color: Red2
Very sturdy and definitely protects my iPad. Great buy even has a part of the pen. Fits perfectly no issues putting it on and it has layers to ensure that your iPad is protected. Color is exactly as pictured. Easy to use and charges fine with the case on
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Reviewed in the United States on March 18, 2026
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NY
Lexington, US
★★★★★ 5
Not broken yet.
Color: Light Purple
I bought this for my daughter’s tablet and she has put it through the test. It has been dropped multiple times and the tablets still good. It was easy to put on, looks good, and does the job.
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Reviewed in the United States on April 26, 2026
A
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Amazon Customer
Bozeman, US
★★★★★ 5
Durable and good case!
Color: Black
Excellent sturdy case to protect iPad. Would buy again!
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Reviewed in the United States on June 2, 2026
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Kelley Mitchell
Natrona Heights, US
★★★★★ 5
Well made
Color: Blue
It’s great, better than I expected. I love I love the color and the fit is perfect. Highly recommend!
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Reviewed in the United States on May 30, 2026
C
Verified Purchase
Carrie A Balashaitis
Charlottesville, US
★★★★★ 4
Good buy
Color: Black
Sturdy and fits perfectly
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Reviewed in the United States on May 6, 2026

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