This is a smaller version of the Deluxe Low-Flow shower head, made by the same company in Canada. If you have truly wretched water pressure (a lot of boats and motor homes seem to have this problem) or a very small shower enclosure, this is what you need. It is an economical way to ensure the lowest volume used, while maintaining an invigorating shower. The opening is only ¾”, but it delivers a 5” diameter spray pattern measured at 18” from the shower head. The convenient throttle valve can slow the shower while shampooing or lathering. You will have NO trouble rinsing your hair, either. Small but mighty, it is still backed by that manufacturer’s 30 day satisfaction guarantee.