The proprietary TheraMAAX™ Jets utilize a scientifically designed grill surrounding the nozzle of the jet. This grill reduces drag on moving parts and cohesion of the jet stream. The TheraMAAX™ design maximizes performance and improves the massaging action. The three spoke stainless steel escustion provides a textured landing for your fingers. This natural shape and position of the landing areas make it easy to adjust the power of the jet.