Extender Upgrade Kit Black Long (Discontinued by Manufacturer) Ergotron DS100 Long Crossbar Extender - Center Display Bracket - Attachment Hardware - Ergotron 5 Years Warranty Ideal for converting a dual-monitor crossbar so it can hold three displays Accommodates larger displays up to 26" when added to an existing triple-monitor crossbar Durable aluminum and steel construction creates an extremely stable platform Mix and match DS100 stands and parts to create custom configurations