This kit is to replace the ropes and main pulley in an Ergotron Workfit-S sit-stand monitor. It includes all 3 ropes and a new pulley. Some additional tools are required for installation (allen bits, hammer, punches, screwdrivers, etc) and are not included. You can see how to install it in this video: 


Repairing a broken Ergotron Workfit-S standing desk

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