Specifications include, but are not limited to: Item #1: Seventeen (17) VIVO Black Height Adjustable Standing Desk Monitor Riser 25” Tabletop Sit to Stand Gas Spring Workstations (Desk-V001G) Item Weight: 26.5 lbs Package Dimensions: 27.2 x 24.4 x 7.9 inches Reference: https://www.amazon.com/VIVO-Height-Adjustable-Standing-Monitor/dp/B078WXFS6Q Item #2: One (1) black Lorell Sit/Stand Monitor Riser (LLR81974) Item Model #: LLR81974 Item Weight: 25 lbs Product Dimensions: 21.5 x 32 x 16 inches Reference: https://www.amazon.com/Lorell-Sit-to-Stand-monitor-riser-black/dp/B017NMXBPS Item #3: Sixteen (16) Dual Monitor adjustable arms; premium aluminum dual; fully adjustable arms.Gas Spring Articulating arms. Universal fit for 13” – 30” Screens, Vesa Mount. It need not be the brand in the reference link but shall be of equal or better quality and features. Reference:http://www.amazon.com/Mount-it MI-1772