The Nicaragua from RIDDER is a square one jet rain shower head equipped with silicone nubs to avoid stubborn lime deposits, and it is easy to clean. The rain shower head is suitable for all standard commercial shower hoses with a thread of 1/2 inch. The shower head can be tilted due to a ball joint. The included rubber gasket also works perfectly with low pressure. Note: Please clean with commercially available cleaning products; do not use abrasive ones.