It could hold up to 22lbs each with ease

<Intelligent Control Panel>User- friendly control panel with two programmable memory modes

4 extension arms are not needed

It is a perfect replacement for the stand that comes with the TV

Ultra Strong Floor TV Stand: This portable floor TV stand can withstand 77Lbs of weight

MOUNTUP Triple Monitor Stand Mount - 3 Monitors Desk Mount for Computer Screens Up to 27 inch, Triple Monitor Arm with Gas Spring, Heavy Duty Monitors Stand, Each Arm Holds Up to 19.8 lbs, White Monitor Arm It could hold up toUniversal Compatibility: Triple monitor stand perfectly fits most flat or curved LCD computer screens up to 27", including but not limited to 27, 25, 24, 23, 22, 21. 5, 21, 20, 19, 17 inches displays. Each arm supports a weight of 4. 4 19. 8 lbs, compatible with VESA patterns 75x75mm and 100x100mm. Support C clamp (desk thickness within 0. 39'' 3. 15'') and grommet mount (desk thickness&hole diameter within 0. 39'' 1. 97'') mounting installation.