VIVO Dual Monitor Height Adjustable Gas Spring Mount/Extended Black Desktop Stand for 2 Screens up to 27" / Vertical & Horizontal Screen Positioning (STAND-V002V) COMPATIBLE with two screens up to 27 in size and 15 lbs in weight each with VESA 75x75mm or 100x100mm mounting holes COUNTER BALANCE gas spring arms for tool-less monitor placement with perfect counter balance presentation in all directions FULLY ADJUSTABLE arms offer 90 tilt, 90 swivel, and 360 rotation for finding all the right viewing angles. Monitors can be placed in vertical or horizontal position DESK CLAMP Mounts to the back of your desk (up to 4 thick) via a heavy-duty C-clamp WEVE GOT YOU COVERED - Sturdy steel design is backed with a 3 YEAR MANUFACTURER WARRANTY and friendly tech support to help with any questions or concerns