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K&M

K&M 21330-900-55 Stage & Studio Equipment Case

★★★★★3.9 (2 reviews)

Steel extension rod with M10 threading for adding 990mm of secure height to speaker and light stands.

$69.99*
✓ In Stock on Amazon.com
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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.

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Overview

The K&M 21330-900-55 is a purpose-built steel extension rod designed to bridge the gap when your speaker or light stand doesn't quite reach the height you need. At 990mm in length, it provides a significant vertical boost by threading directly into your existing stand assembly via its dual M10 connections — an internal threaded bush on one end and an external threaded bolt on the other. This standard threading ensures broad compatibility with professional stands that use the M10 format, and the tool-free installation means you can set up and break down quickly on stage or in the studio.

Built entirely from steel, this rod prioritizes structural rigidity over lightweight portability. It won't flex or bow under the weight of speakers or lighting fixtures, maintaining a stable, secure platform at extended heights. The black finish keeps it visually unobtrusive in performance and production environments. While the fixed length means you can't dial in a custom height, the 990mm span covers most scenarios where a standard stand falls short, making it a practical addition to any stage tech or studio grip toolkit.

Key Features

For speaker and light stands

Made of steel

Threaded bush m10 and threaded bolt m10

990 mm rod height

Available in black colour

Specifications

Brand
K&M
Model
21330-900-55
Material
Steel
Rod Height
990 mm
Threading
Internal M10 threaded bush / External M10 threaded bolt
Compatibility
Speaker and Light Stands
Color
Black

Pros & Cons

👍 Pros

  • Steel construction provides rigid, stable support without flexing under load
  • M10 threaded bush and bolt ends ensure secure, standardized connections to compatible stands
  • 990mm length offers substantial height extension in a single piece
  • Simple threaded design requires no tools or clamps for installation
  • Black finish blends discreetly with most stage and studio stand equipment

👎 Cons

  • Fixed 990mm length cannot be adjusted shorter for setups that need less extension
  • Adding nearly a meter of height raises the center of gravity, requiring a stable base to prevent tipping
  • Steel construction adds noticeable weight to the overall stand assembly
  • Only compatible with M10-threaded stands, excluding setups that use different thread sizes

Frequently Asked Questions

It fits speaker and light stands that use M10 threaded connections, which is a common standard across many professional stage and studio stand brands.
It features an internal M10 threaded bush on one end and an external M10 threaded bolt on the other, allowing it to thread directly between a stand's base and top section.
The rod adds 990mm (approximately 39 inches) of height to your existing stand setup.
It is constructed from steel, providing rigid, stable support that resists flexing under the weight of mounted equipment.
The rod is a fixed 990mm length and is not designed to be cut, as modifying it could compromise the threading and structural integrity.

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