Ergotron - LX Desk Monitor Arm in Black, Monitor Mount with patented Constant Force Technology, for displays up to 34", 3.2-11.3 kg with VESA-Standard : Amazon.co.uk: Electronics & Photo
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Ergotron – NX Single Monitor Arm, VESA Desk Mount – for Monitors Up to 34 Inches, 0 to 8 kg – White : Amazon.co.uk: Computers & Accessories