I bought this item because it was compatible with Mount It! The Vesa dual monitor mount was too short. The VIVO brand matched my gear perfectly. There are three small mounting screw holes surrounding the larger mounting screw hole in the center of the base of the tube and I believe this is standard on most Vesa mounting kits purchased here at Revain. I only needed two pieces of tubing for my needs, but it's nice to have an option for three and it was easy to install. All that was included in the kit were three pieces of pipe connected together; no hardware as stated in the product description.