RAM® Double Ball Mount with Diamond Plate Adapter - Long
Variants
Ball Base Information
"RAM" Prefix Code
To provide lightweight strength and corrosion resistance, RAM is made of marine grade Aluminium with a black powder coated finish, stainless steel hardware and 'rubber balls' - 'RAM' products are stiffer and stronger than their 'RAP' variants and typically used in more rugged applications.
"RAP" Prefix Code
Many of our 'RAM' products are available in a 'RAP' - composite variant. Our composite 'RAP' products are generally designed for lighter duty applications where keeping the weight of the mount low is a priority.
RAM® BALL SIZES
The weight limits below are a guide only. All factors in a planned mounting configuration should be considered to choose the most suitable ball size.
The most common ball size applications:
B Size - Action Cameras, Phones and Small Tablets
C Size - Medium - Large Tablets in Heavier Duty Applications
D Size - Heavy and Rugged Tablets and Laptops in Commercial Applications
Please check with our technical team for advice.


Backorder parts are normally available within a 4 to 6 week timeframe. Please contact our sales team for more accurate delivery information.
You can also order the individual component parts below.
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Features
- Drill-down mounting solution; use diamond plate featuring the AMPS hole pattern for attachment to compatible device holders
- Includes one round ball base, one diamond ball base, and C size long length double socket arm; ball and socket technology allows for near-infinite adjustability
- Made of powder-coated, marine-grade aluminum for durability and reliability in the most demanding environments
- Backed by a lifetime warranty
The RAM® Double Ball Mount with Diamond Plate Adapter - Long (RAM-138U-D) consists of a long double socket arm, one 2.5" diameter round base, and one 2.43" x 1.31" diamond base. Each base features the universal AMPS hole pattern, making them compatible with all RAM® device holders. The mount is designed with a 1" diameter rubber ball and socket system that features adjustment points at both ends of the double socket arm, allowing for near-infinite adjustability for ideal viewing angles.
Components
product dimensions
Overall Height: 10.85"
socket to socket length
8"
hole pattern
4-Hole AMPS: 1.181" x 1.496"
3-Hole 120-Degree: 1.812" Diameter
plate size
2.5" Diameter
ball size
C Size (1.5")
weight capacity
Standard Use: 4 lbs
Heavy-Duty Use: 3 lbs
materials
Marine-grade aluminum
packaging type
Poly Bag
Weight
0.957 kg