This product is either discontinued or we cannot get that from suppliers.
KENSINGTON 60273 Smartfit Dual Monitor Arm Mount, SmartFit, VESA 100x100mm, VESA 75x75mm, Cable Management, Monitors, 4K Monitors.
Kensington has created the Smart fit dual monitor arm mount. It allows you to add a second display to your desktop, which studies have shown can have a significant impact on daily productivity.