---
product_id: 267744949
title: "8\" Double Ball Aluminum Extension Arm"
brand: "minifocus"
price: "£52.25"
currency: GBP
in_stock: true
category: "Minifocus"
url: https://www.desertcart.co.uk/products/267744949-8-double-ball-aluminum-extension-arm
store_origin: GB
region: United Kingdom
---

# Waterproof & rustproof design 8-inch precision length CNC anodized aluminum alloy 8" Double Ball Aluminum Extension Arm

**Brand:** minifocus
**Price:** £52.25
**Availability:** ✅ In Stock

## Summary

> 💡 Illuminate your dive like a pro—never miss the perfect shot!

## Quick Answers

- **What is this?** 8" Double Ball Aluminum Extension Arm by minifocus
- **How much does it cost?** £52.25 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/267744949-8-double-ball-aluminum-extension-arm)

## Best For

- minifocus enthusiasts

## Why This Product

- Trusted minifocus brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Lightweight Hollow Design:** Minimizes underwater drag and fatigue without compromising strength or stability.
- • **Durable CNC Aluminum Alloy:** Engineered from corrosion-resistant anodized aluminum for long-lasting, rustproof performance.
- • **Universal 1" Ball Head Connector:** Seamlessly compatible with all 25mm ball head systems—plug and play versatility.
- • **Precision 8" Double Ball Extension:** Optimize your underwater rig with exact 20.3 cm reach for perfect lighting angles.
- • **Stable Connection with Silicone O-Rings:** Friction gasket protection ensures rock-solid, wobble-free mounting for your strobes and video lights.

## Overview

The MINIFOCUS 8" Double Aluminum Extension Arm (2-pack) is a premium underwater accessory crafted from corrosion-resistant CNC anodized aluminum. Featuring a universal 1" ball head connector with silicone O-ring gaskets, it offers stable, adjustable mounting for strobes and video lights. Its lightweight hollow design reduces underwater resistance, making it ideal for professional divers and underwater photographers seeking precision and durability.

## Description

desertcart.com: MINIFOCUS 8" Double Aluminum Extension Arm, 1" Ball Head Connector Underwater CNC Arm System Ball Head Extension for Strobe/Video Light/Diving Camera Tray, Waterproof and Rustproof (2pack) : Electronics

## Features

- Specification: Length: 8 inch/20.3 cm; Ball size: 1 inch/25 mm; Weight: 5.57 oz/158 g; 2x 8" double 1" ball extension arm; 2x free replacement O-rings
- High Quality Material: Made by corrosion resistant anodized CNC aluminum alloy, anti-corrosion; The hollow design makes it lighter and reduces resistance when used underwater
- Ball Head with Protection Ring: 1" ball head made by corrosion resistant anodized aluminum alloy with silicone O-ring friction gaskets, avoid friction during connection and make the connection more stable
- Free Extension: 8" double 1 inch ball arm supports to connect strobe or video light, freely adjust the angle to get the best lights angles to take the best photo you want
- Connector: Double ball adapter connect your underwater strobe or video light via the light holder. The size is universal and compatible for all arm systems that has a ball head which diameter is 25 mm/1 inch

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08MYX5S3H |
| Best Sellers Rank | #2 in Underwater Lighting Parts & Accessories |
| Brand | MINIFOCUS |
| Built-In Media | 2x 8'' Double Ball Extension Arm |
| Color | 2PCS 8'' Double Ball Extension Arm |
| Compatible Devices | Compatible for all arm systems that has a ball head which diameter is 25 mm/1 inch |
| Customer Reviews | 4.8 4.8 out of 5 stars (123) |
| Folded Size | 4.5 inches (l) x 1 inch (w) x 1 inch (h) |
| Item Dimensions D x W x H | 1"D x 1"W x 9"H |
| Item Weight | 6.72 ounces |
| Manufacturer | MINIFOCUS |
| Manufacturer Part Number | MF08 |
| Maximum Weight Recommendation | 158 g |
| Model Name | Double Ball Extension Arm |
| Model Number | MF-08 |
| Number of Items | 2 |
| Screen Size | 20.3 centimeters |
| UPC | 824382490484 |
| Warranty Description | 30 Days |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** MINIFOCUS
- **Color:** 2PCS 8'' Double Ball Extension Arm
- **Compatible Devices:** Compatible for all arm systems that has a ball head which diameter is 25 mm/1 inch
- **Folded Size:** 4.5 inches (l) x 1 inch (w) x 1 inch (h)
- **Item Weight:** 6.72 ounces
- **Number of Items:** 2
- **Product Dimensions:** 1"D x 1"W x 9"H
- **UPC:** 824382490484

## Images

![8" Double Ball Aluminum Extension Arm - Image 1](https://m.media-amazon.com/images/I/61i05RanehL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: These are suitable for Underwater/Marine use?**
A: These extension arms can be used under sea water. First of all, this product is underwater shooting supplies. Secondly, this ball extension arm is made of aluminum alloy, which has excellent corrosion resistance.

**Q: Will the small balls at the ends slip?**
A: Having never have slip while using them as long as you remembered to tighten the clamp. The friction from the silicone ring and the clamps, which can be adjusted to obtain by adjusting the clamp locking.

**Q: An extension arm has two length sizes, how should I choose?**
A: From this end of the ball to the other end of the ball is the overall length of the extension arm, but according to the actual size of the product that can be used, it should start from the red silicone O-ring.

## Frequently Bought Together

- MINIFOCUS 8" Double Ball Aluminum Extension Arm, 1" Ball Head Connector Underwater CNC Arm System Ball Head Extension for Strobe/Video Light/Diving Camera Tray, Waterproof and Rustproof (2pack)
- MINIFOCUS 4PCS 1'' Aluminum Ball Clamp Mount for Underwater Diving Light Arms Tray System, Photography Diving Camera, 360° Clip Adapter Bracket for Action Camera Flashlight Arms System
- 4Pcs Underwater Camera Buoyancy Float Kits, Buoyancy Provided 175g*4, Diameter 3.15", Thickness 1.5", Aquatic Arm Float Kit for Seafrogs/nitescuba/Starbea Floating Arms Diving Tray

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*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-08-30*