Our Tall Post Through Desk Fitting TDF134 is compact and sturdy requiring just 60mm diameter (6cm) of desk space. The top plate is 6mm thick steel and the M10 Bolt requires a 10mm clearance hole through the platform for permanent fitting to platforms up to 35mm thick. Other bolt length are available usually from stock, please ask for details. The Tall Post is 134mm tall and may suit taller users and features Variable Friction Joint (VFJ) to adjust for pivot friction. Desk Protection Pad to minimise any marking of your desktop platform is included.