The KCD220 offers the ability to ergonomically mount multiple displays.
Also check out the Kontour K2C22H products, which provide additional manual height adjustment on the column and other improved features and performance:
http://www.chiefmfg.com/Products/K2C22HBhttp://www.chiefmfg.com/Products/K2C22HS
Note: Mounting surface maximum thickness: 3.2" (81 mm), grommet hole size: 0.38"- 3" (10-76 mm)
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