Our large nozzle is carefully designed and manufactured to ensure it's super smooth and comfortable. Our unique design has a safety ridge to ensure that the threads are away from your sensitive rectal skin while in use. As well we've designed the internal part of the nozzle to control water velocity through all of the holes. You'll notice that water emerging from the five holes of our nozzle comes together to create a steady stream of water!!! We also took great care in the manufacturing so that all the holes have very soft rounded edges. Our nozzles are dishwasher ready, boilable, and easy to clean. To make sure our system is most convenient for our customers, we made sure our nozzle works with any standard shower hose. Yes, we're proud of our nozzles!