1.8 cm adjustable opening. Angle is always adjustable thanks to the swiveling nozzle head. The directional ball in the nozzle head can be swiveled, allowing you to individually adjust the water angle. You have the option of installing a 32 mm or 38 mm pool hose on the massage nozzle. The hose nozzle allows you to quickly and easily connect a hose clamp to the pool hose. The octagonal outer nut with a wrench width of 7.7 cm ensures easy and firm installation of the 140 mm inlet nozzle on the pool wall. The optimal feel allows easy installation by hand. Easy installation on already standing pool systems. For installation, you only need a round opening of 58 mm in the wall of your pool. The inlet can be securely installed thanks to the 2 silicone seals supplied. The spout can be unscrewed if necessary thanks to its non-slip external thread. This way, the nozzle head can be removed and you have the option to connect an LED inlet nozzle or an LED fountain with a 48 mm external thread.