Long Double Socket Arm — 150mm, 1.5" Ball, White Powder-Coated Aluminium (RAM Compatible)

The 150 mm long double socket arm is the workhorse joint of any 1.5” B-size mount stack — rated for the Garmins, GPS plotters, big phones in cases, dash tablets and helm-mounted screens. This is the “medical white” powder-coated aluminium version, built for spaces where a chunky black bracket looks out of place: marine cabins, caravans, RVs, ambulance and patient transport, cleanrooms, and any bright workshop or healthcare bench.

Same extra-strength locking design as the standard arm — just longer reach (150 mm centre-to-centre) and a bright white finish that disappears against painted bulkheads, ceiling pods and white interior trim. Drop it into your existing Modular Mount System kit when you need to bridge a longer gap or angle around a windscreen pillar.

Why we picked it

• Marine-grade aluminium — light, strong, won’t rust on the salt
• White powder coat — UV stable, anti-corrosion, blends with white interiors
• RAM B-size compatible — works with any 1.5” (38.1 mm) ball head, including our existing white-finish base plates and clamps
• 180° vertical / 360° horizontal adjustment — loosen the wing knob, find your angle, lock it down
• 150 mm centre-to-centre — longer reach to clear pillars, cabinets, awnings or instrument hoods

Specifications

Where it fits

• Marine helms, flybridges, cabin overheads — white finish disappears against painted ceilings
• Caravans, RVs, motorhomes — bridges longer gaps from base plate to screen, away from windscreen pillars
• Ambulance, patient transport, healthcare carts — meets the white-equipment look
• Cleanrooms, labs, bright workshops — coordinated with white walls and benches
• Anywhere a longer 1.5” arm is needed and a black version would look out of place

What you get

1 × 150 mm long double socket arm, white powder-coated aluminium, with integrated wing knob locking handle. Ball heads and base mounts sold separately — see the rest of the Modular Mount System for matching white-finish components.

Compatibility note

Designed for 1.5” (38.1 mm / RAM B-size) balls. Works with any standard B-size ball head — ours, RAM, or third-party. If you’re unsure whether your existing mount uses B-size, drop us a line.