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 7.7 cm wrench-width octagonal outer nut ensures easy and firm mounting of the 140 mm inlet nozzle on the pool wall. The optimal feel allows for easy manual assembly. Easy installation on already standing pool systems. For installation, you only need a 58 mm round opening in the wall of your pool. The inlet can be securely installed thanks to the 2 supplied silicone seals. The spout can be unscrewed if necessary thanks to its grippy external thread. This allows the nozzle head to be removed and you have the option of connecting an LED inlet nozzle or an LED fountain with a 48 mm external thread.