3M Dual-Swivel Monitor Arm, Black (MA140MB)
Bottom line: The 3M Dual-Swivel Monitor Arm ($118.53 on Amazon as of 2026-10-07): Holds up to 30 lbs, enough for most 27-inch displays on one arm; main trade-off: rated for monitors 27 in and under, so 32 in and ultrawide panels are out.
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*Price sourced from Amazon.com. Last updated 2026-10-07. Price and availability subject to change.
Pros & Cons
Pros
- ✓ Holds up to 30 lbs, enough for most 27-inch displays on one arm
- ✓ Extends 19 1/2 in from the base with 7 1/2 in of height travel on the pole
- ✓ Rotates landscape to portrait, tilts forward and back, slides front to back
- ✓ Clamp and grommet hardware both included, no separate mount purchase
Cons
- ✗ Rated for monitors 27 in and under, so 32 in and ultrawide panels are out
- ✗ Single-display arm, no dual-monitor configuration
- ✗ Listing conflicts on clamp limit: 4 1/4 in in features vs 2.36 in in specs
- ✗ Height adjustment limited to 7 1/2 in of pole travel
Manufacturer description
Monitor arm provides 7 1/2" of height adjustability on pole and extends 19 1/2" from the base. Monitor can rotate from landscape to portrait, tilt forward and back and move front to back for optimal viewing. Clamp and grommet mount hardware fits desks up to 2.36" thick. Weight capacity of 30 lbs., and monitor size ≤27", VESA MIS-D Compliant.
SpecPicks Verdict
SpecPicks scored 3M Dual-Swivel Monitor Arm using a rating × review-volume × price-fit model applied to published specs and reviews across the home & kitchen category. Compare with similarly-priced alternatives in the home & kitchen category before committing. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.
Common buyer scenarios for home & kitchen of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.
Key Features
- Provides 7 1/2 in of height adjustability and extends 19 1/2 in from the base
- Clamp mount fits up to 4 1/4 in thick; grommet mount fits up to 2 1/4 in thick
- Weight capacity of 30 lbs.
Full Specifications
| Brand | 3M |
|---|---|
| Color | Black |
| Material | Unspecified |
| Model Number | MA140MB |
| Mounting Type | Tabletop Mount |
| Movement Type | Rotate, Swivel, Tilt |
| Built-In Media | MA140MB |
| Item Type Name | 3M Dual-Swivel Monitor Arm - Desk mount (MA140MB) |
| Mfr Part Number | MA140MB |
| Compatible Devices | Monitor |
| Enclosure Material | Unspecified |
| Maximum Tilt Angle | 90 degrees |
| Warranty Description | 1-Year Limited |
| Maximum-Supported Screen Size | 27 inches |
| Minimum-Supported Screen Size | 26 inches |
| Global Trade Identification Number | 00051141359779 |
Ready to buy?
3M Dual-Swivel Monitor Arm, Black (MA140MB) is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-10-07. Price and availability subject to change.
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