Cotytech DM-GS21A Expandable Apple Desk Mount Spring Arm

Product ID 17909


  • Standard Pole Length: 7.87"
  • Compatible with the following Apple monitors:

   24" iMac (aluminum and glass)

   27" iMac

-    24" LED Cinema Display

-    27" LED Cinema Display

-    27" Thunderbolt Display

   21.5" or 27" iMac with Built-in VESA Mount Adpater early 2013

   27" iMac Retina with Built-in VESA Mount Adapter



Cotytech DM-GS21A Expandable Apple Desk Mount Spring Arm - Silver is a stylish desk mount that is perfect for your Apple LCD monitor. With a 180° swivel function and a weight capacity of 30.8lbs (14kg), this desk mount is ideal for offices, classrooms, private homes and public areas. It’s the perfect accessory for the busy individual; and can fit neatly into any home office space. This desk mount has +90° / -45° tilt actions to ensure perfect viewing at any angle. The convenient desk arm features robust cable management; ensuring a neat and tidy desk space with no visible cables.

This convenient and stylish LCD desktop mount offers perfect flexibility and is maneuverable to suit any viewing angle. It has a modern look; which fit in perfectly with Apple’s stylish looks. The monitor mount has been designed with the latest engineering technologies in mind; to ensure durability and strength. These quality mounts are manufactured in our offshore manufacturing plant; adhering to strict quality guidelines that enable us to deliver value to our customers. This handy Cotytech monitor mount has been manufactured with the end-user in mind; and ensures easy installation features while simultaneously offering intuitive, practical and functional designs.


Technical Drawing

Technical drawing for Cotytech DM-GS21A Expandable Apple Desk Mount Spring Arm



Weight Capacity

Supports 17.6 - 30.8lbs (8 - 14kgs)


+90° / -45°




Max 180°

Mounting Pattern

VESA compliant: 75x75 and 100x100

Maximum Extension

27.6" (700mm)



  • Designed for the following Apple Monitors:
    24-inch iMac (aluminum and glass)
    27-inch iMac
    24-inch LED Cinema Display
    27-inch LED Cinema Display
    27-inch Thunderbolt Display
    21.5" or 27" iMac with Built-in VESA Mount Adapter early 2013 please be sure to choose the option of 'iMac Early 2013'
    If your Apple monitor is not listed above, please contact us for solutions.
  • Desk-mountable, available in clamp base and grommet base
  • Clamp table thickness: 0.2"-2.21" (5-55mm); Grommet table thickness: 0.2"-2.21" (5-55mm), Hole Diameter: 0.39"-1.97" (10-50mm)
  • Spring arm design makes extension, retraction and height adjustments dynamically and easily
  • Pole length: 7.87" (200mm)
  • Expandable to support two monitors with additional arms Longer pole may be needed depends on monitor size
  • Maximum adjustment rendered by tilting, swiveling, rotation and dynamic height adjustment
  • Swift and easy movements and adjustments
  • Height Adjustment Range: 5.1" at 7.87" pole (16.95" at 19.7" pole), 11.2" - 13.4" at monitor
  • Solid Aluminum die-cast construction
  • Space saving with its compact design
  • Smooth extension (up to 27.6") to achieve ideal viewing angles
  • Clean look with minimal hardware visible from underside of work surface
  • Rotation 360° and side-to-side pivot
  • Neat and efficient cable management
  • Maximum productivity and supreme ergonomic comfort
  • Easy installation and dis-installation
  • Color: Metallic Silver (please contact us for special order of white, dark gray or red color)

Product Options/Accessories

Frequently Asked Questions

q I really like the arm presented here. I have two questions. Will it work with the new 27" iMac and can you use the arm upside down?

This arm will work with the new 27" iMac. We do not recommend mounting the unit upside down. The manufacturer recommends only mounting it vertically to a desk with a clamp base or grommet base.

Model DM-GS21A
Manufacturer Cotytech
Part Number DM-GS21A
Color Metallic Silver
Tilt +90 degree / -45 degree
Weight Capacity 17.6 - 30.8lbs (8 - 14kgs)
Rotation 360 degree
Swivel Max 180 degree
Mounting Pattern VESA 75x75 and 100x100
Maximum Extension 27.6" (700mm)
Height Adjustment 5.1" at 7.87" pole (16.95" at 19.7" pole), 11.2" - 13.4" at monitor
Pole Length 7.87" (200mm); Longer pole options available
Clamp Thickness 0.2"-2.21" (5-55mm)
Grommet Thickness 0.2"-2.21" (5-55mm)
Hole Diameter 0.39"-1.97" (10-50mm)
Monitor Size 24" iMac (aluminum and glass). 27" iMac. 24" LED Cinema Display. 27" LED Cinema Display. 27" Thunderbolt Display

Customer reviews

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  • 5 stars 1
(5 out of 1)
Expandable Apple Desk Mount Spring Arm

by Brenda J, Bowling Green, Ohio, Feb 15, 2019

Excellent product!