The Grohe Rainshower elbow sink is a unique and stunning addition to any shower set-up and is designed to connect to your shower. It features a square escutcheon and is crafted using superior raw materials, making the accessory incredibly strong and resistant to impact damage, scratches, stains and more. It features a G 12. 7 mm male thread inlet and outlet connection and is protected against backflow. It is backed by 5 years warranty against any manufacturing defects.