The sleek, adjustable Ergotron MX Desk Mount LCD Arm accommodates mid-size displays and All-in-One computers weighing up to 30 lb, 5" (13 cm) of height adjustment, extension/retraction motion, integrated tilt and portrait-to-landscape capability promote user comfort and enhance productivity.
Reviewed by 1 customers
Yes this arm works with monitors over 27" and 24 lbs.. Worked well with the Apple Cinema LED. Instructions are not very clear. After installation and Monitor in place it dropped down in height and in tilt. It wasn't until I read in small print on the back page how to increase tension. This should have been displayed with clear wording and not on the back page. But after tension was adjusted then it all worked fine. There should really be another proper tool to be packed with it. Some people do not have tools. And Adorama seemed to have taken it out of it's original box and just packed it a brown box. So when it was opened half of the pieces came falling to the floor and 2 plates are very heavy.