Large Size: 8.3 cm: Our high-pressure shower head features a panel with a diameter of 98 mm, which is even and wide enough to cover the entire body. High-Pressure Shower Head: Air enters the shower head through the panel's outlet hole and mixes with the water. The air is then forced into the shower head to create a kinetic energy mixture with the water, increasing the pressure. The high-pressure shower head provides you with a smooth showering experience. Silicone Nozzle – Anti-Clogging: The shower head is reinforced with highly flexible liquid silicone, which is more flexible and less prone to clogging than other universal shower heads for a longer lifespan. Simply press lightly on the water outlet to remove limescale, effectively preventing the universal shower head from clogging and making it easy to clean. 【High-Quality Materials – Durable】 The surface of the shower head is treated with a 10-layer plating technique, making it more durable and colorfast. The shower head itself is made of high-quality solid brass, which is far superior to other cheap metal or plastic shower heads. Standard Size: 1.3 cm BSP: 1.27 cm British Standard fitting – Suitable for use with all our shower sets and wall mounts. A simple screw-mounted shower head; no tools required.