Kupo KS-420 Super Knuckle 3in Extension Arm Double Ball

Kupo KS-420 Super Knuckle — 26mm Double Ball CNC Aluminum Extension Arm with 127mm Reach

This Kupo KS-420 extension arm features CNC-machined aluminum construction and a black anodized finish. It has a 26mm ball on both ends and provides a total extension of 127mm. Use it to build custom arm configurations together with a Super Knuckle w/ Hex Baby Pin (KG017711).

Key features

• CNC machining aluminum double ball heads
• Dia. 26mm for the ball head
• Black anodized surface treatment
• Allows to extend 127mm in total length
• Limited two-year warranty

Compatibility and use

Use this extension arm when you need to extend or customize a ball-arm rig. In particular, it pairs well with the Super Knuckle w/ Hex Baby Pin (KG017711) to create tailored arm configurations. Moreover, because both ends feature 26mm balls, you can combine multiple arms and knuckles in a modular setup.

Specifications

Why choose this arm

The KS-420 provides a straightforward way to add 127mm of extension between ball joints. Because it uses 26mm balls on both ends, it integrates smoothly with other 26mm ball-based components. Additionally, the black anodized finish maintains a consistent look within a professional rig setup.

FAQ

Question: Will this extension arm work with a Super Knuckle w/ Hex Baby Pin (KG017711)?
Answer: Yes. The KS-420 is described as ideal for building custom arm configurations with a Super Knuckle w/ Hex Baby Pin (KG017711), so you can combine them to extend and configure your rig.

Question: What is the diameter of the ball ends?
Answer: The extension arm has 26mm diameter balls on both ends, which matches other 26mm ball-based components.

Question: What materials and finish does the arm have?
Answer: The arm is CNC-machined from aluminum and features a black anodized surface treatment, as stated in the product description.

Question: How long is the extension provided by this arm and is there a warranty?
Answer: The arm allows for a total extension of 127mm and comes with a limited two-year warranty.