This is a Tyke Supply model 19 This is the ultimate dual LCD monitor stand. This will hold up to 27″ LCD monitors with room to spare. Arm expands 40 inches. Securely holds two LCD monitors above the desktop to increase work space, improve visibility, and minimize clutter. 40″ double-link swing arms optimize ergonomics and monitor views with separate tilt, rotate, side-to-side, height, and tension adjustments SPECIFICATIONS Fits 75 x 75 mm and 100 x 100 mm VESA-compliant monitors — Installs on horizontal surfaces up to 3.5 in. thick DIMENSIONS pole height, 18 in.; arm radius, 18 in.; Circumference pole 4.5in, arm width (extended), 40 in.; weight, 18 lbs. PACKAGE CONTENTS LCD Monitor Pole with Double-Link Swing Arms — Cable management clips and trim caps — Installation hardware with instructions and hex tool Please make sure you are mounting this arm to a solid desktop surface that will be able to withstand the combined weight of the stand and monitors. Make sure your desktop is not hollow.