StarTech.com Desk Mount Monitor Arm, VESA/Apple iMac/Thunderbolt/Ultrawide Display up to 49' (30.9lb/14kg), Height Adjustable/Articulating - VESA 75x75/100x100mm desk mount monitor arm for single large or ultrawide screen up to 30.9lb or 44 inch - Works w/ iMac/Apple Thunderbolt Display - Articulating monitor mount tilt/swivel/rotate; Height adjustable pole - Clamp/grommet - Easy assembly