Suitable for most shower head, these replacement nozzles can be easily fit. The installation process is simple and requiring you to remove the old and insert the new nozzle. Great for shower head with opening size of 4mm/0.16inch. Easy and efficient to replace old or damaged nozzles. Each package contains 50pcs shower head nozzles to ensures that you have enough replacement for future needs. These food grade silicone parts is designs for high temperatures and provide improved durability and for long terms performances in your shower.