SKU: 89174877168

RAM Double Ball Mount with Round & Diamond Bases - C Series - Short Arm

Sale price$105.34 Regular price$117.05
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Description

RAM Double Ball Mount with Round & Diamond Bases - C Series - Short ArmRAM 138U B RAM Double Ball Mount with Round & Diamond Bases C Size Short The RAM 138U B is a drill down mounting solution pairing a round AMPS base and a diamond AMPS base on a short C Series double socket arm, giving a compact, near infinitely adjustable mount with 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-138U-B RAM® Double Ball Mount with Round & Diamond Bases – C Size Short

The RAM-138U-B is a drill-down mounting solution pairing a round AMPS base and a diamond AMPS base on a short C Series double socket arm, giving a compact, near-infinitely adjustable mount with 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 short C Series double socket arm for a low-profile fit
  • RAM® 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 1.5" C Size balls suit any RAM® holder built for a C Size ball.

Dimensions & Specifications

  • Overall height: 132.7mm (5.23")
  • 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: 1.5" rubber ball, C Size
  • Material: powder-coated marine-grade aluminium
  • Weight: 390g (0.86 lbs)
  • Load rating: 1.814kg (4 lbs) standard use, 1.36kg (3 lbs) heavy-duty use

What's Included

  • RAM-202U round base with 1.5" ball
  • RAM-238U diamond base with 1.5" ball
  • RAM-201U-B short double socket arm for C Size 1.5" 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: 89174877168

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lauren
Houston, US
★★★★★ 5
Bright Skin
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My skin looks so much healthier and brighter since using this
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Reviewed in the United States on May 26, 2026
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Alexis Hernandez
San Leandro, US
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Great mate finish. Non-sticky and good coverage.
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Reviewed in the United States on May 13, 2026
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Deepankar Joshi
Birmingham, US
★★★★★ 4
Regular Use ongoing
Style: Uneven & Discolored Skin
One good thing about this is you barely feel it No oiliness , very light , no fragrance (a positive) and hopefully does its job . Using it as part of regimen so would suggest to everyone
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Reviewed in the United States on August 6, 2025
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Rachel Chavez
Carnegie, US
★★★★★ 5
Great daily sunscreen with lightweight feel
Size: 1.7 Fl Oz (Pack of 1), Size: 1.7 Fl Oz (Pack of 1)
I’ve been using this sunscreen daily and I really like it. It feels very light on the skin, absorbs quickly, and does not leave a greasy or heavy feeling. It also works well under makeup and does not cause breakouts. I feel my skin is well protected from the sun and it’s gentle enough for everyday use. I highly recommend it for anyone looking for a reliable sunscreen.
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Reviewed in the United States on May 19, 2026
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Yeimy santos
Draper, US
★★★★★ 5
Great for oily acne-prone skin
Size: 3 Fl Oz (Pack of 1)
I have oily, acne-prone skin, and this sunscreen has worked really well for me. It doesn’t feel overly greasy or too dry, and it sits nicely on my skin without making my face feel heavy. I’ve been using it for a long time, and honestly, it’s the only sunscreen I keep going back to because it works so well with my skin. It feels comfortable for daily use and gives good protection without causing extra breakouts for me.
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Reviewed in the United States on May 16, 2026

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