Cotytech DM-GS21A Expandable Apple Desk Mount Spring Arm

5 out of 5 (based on 1 review)
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

Our Price: $193.54
Shipping: $29.98 *
Usually ships in 2 to 3 business days
* applies to Contiguous United States



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)

Frequently Asked Questions

Question: 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? Answer: 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

Review this product

Cotytech DM-GS21A Expandable Apple Desk Mount Spring Arm

Expandable Apple Desk Mount Spring Arm, Feb 15, 2019
by Brenda J, Bowling Green, Ohio
Excellent product!
0 of 0 voted this review as helpful Was this review helpful to you?
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