Display POS Height Adjustable Back to Back Adapter Requires SD-POS-HA - Dual configuration accessory for the Spacedec SD-POS-HA display mount; easily converts single display mount into a back-to-back configuration. Quick release mechanism for fast display attachment/removal with optional security screwLoad Capacity 44 lb Maximum. Ball joint mechanism allows 20 degrees of display adjustment in any direction from the vertical plane- Supports mounting hole pattern: 75mmx75mm; 100mmx100mm- Black