The 15cm double socket arm is the most versatile mid-length option in the Modular Mount System. It connects any two 1.5" (38.1mm) C-size ball components — a base at one end, a device holder at the other — giving you 150mm of adjustable reach between them. Built from marine-grade aluminium with a durable powder-coated finish, it handles salt spray, vibration, and harsh conditions without issue.
Dual ball sockets with a centre tension knob let you dial in the exact angle and lock it down firmly. Each joint offers full 360-degree rotation, so positioning your fish finder, chartplotter, tablet, or any other device is fast and intuitive — even in tight spaces on a boat console or 4x4 dash.
Key Features
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15cm (5.9") arm length: The go-to middle-length option — long enough for comfortable reach, short enough to maintain stability under vibration.
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360-degree adjustability: Ball-and-socket joints at both ends provide infinite angle combinations for precise device positioning.
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Marine-grade aluminium construction: Lightweight yet strong, with excellent corrosion resistance for marine, 4x4, and outdoor environments.
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Powder-coated finish: Available in Black or White — durable coating resists scratches, chips, and UV degradation.
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Stainless steel hardware: Includes S.S spring, S.S screw bolt, and S.S gasket for long-lasting clamping force and corrosion resistance.
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Nylon tension knob: Easy to grip and adjust by hand — no tools required for angle changes in the field.
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Shockproof and vibration resistant: Designed to hold firm on rough roads, choppy water, and heavy equipment.
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C-size compatible: Works with all 1.5" ball mount systems including RAM-compatible bases, holders, and adapters.
Specifications
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Ball size: 1.5" (38.1mm) C-size
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Arm length: 150mm (5.9")
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Material: Marine-grade aluminium body, stainless steel hardware
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Finish: Powder-coated (Black or White)
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Compatibility: All 1.5" C-size ball bases, holders, and adapters
What's Included
- 2x Aluminium arm halves
- 1x Stainless steel spring
- 1x Stainless steel screw bolt
- 1x Nylon gasket
- 1x Stainless steel gasket
- 1x Nylon tension knob
In the Field
Mount your fish finder at the perfect viewing angle on the boat, position a tablet on the 4x4 dash for navigation, or set up a chartplotter on the centre console. The 15cm arm gives you enough reach to clear obstacles and position devices comfortably without the wobble that comes with longer arms. Paired with a ball base and device holder from the Modular Mount System, you have a complete adjustable mounting solution.
Part of the Modular Mount System. Ships Australia-wide.
