Even with 27-inch monitors, the weight, VESA hole pattern, and back shape can be completely different. The truly reliable approach is to match "bracket load capacity range" with "installation conditions" item by item.
Phase 1: Confirm VESA hole pattern
VESA refers to the horizontal and vertical distance between the four mounting holes on the back of the monitor, commonly 75 × 75 mm or 100 × 100 mm. If the monitor does not have standard VESA holes, an original or suitable adapter bracket is needed; do not assume universality.
- Check the monitor manual
- Measure from hole center to hole center
- Confirm screw specifications and hole depth
Phase 2: Match bare monitor weight with load capacity
Load capacity should be calculated based on the monitor's weight after removing the original stand. If a gas spring arm operates consistently near its upper or lower limits, its adjustment range and stability may be affected; for dual monitors, each monitor must be checked individually.
Phase 3: Check tabletop and rear space
Measure tabletop thickness, clamp contact area, and under-table obstructions. For workstations against a wall, also allow space for arm rotation and cable bending; short arms, forward-mounted, or inverted designs might be more suitable for shallow desks.
- Is the tabletop solid and flat
- Are there beams below the clamp
- Will the monitor hit the wall when moved
Single arm vs. dual arm: How to choose
Single arms are easier to set up incrementally; dual arms can unify height but require a central desk clamp and higher overall load capacity. If two monitors differ significantly in size or weight, two independent single arms are sometimes more flexible.
