9600-9640 Massage Forward-Backward HydraulicThe Forward Backward Hydraulic, made especially for the Gulfstream spa pedicure massage chair models 9600 and 9640, improves the functioning and comfort of your massage chair. This crucial part makes sure that the forward and backward action is steady and smooth, giving your clients a completely personalized and soothing massage experience. To improve the performance of your pedicure spa massage chair, replace the forward and backward piston on your