Thank you for viewing. This is an adapter to direct the showerhead downwards. If you want to angle your shower more downwards, attaching this will allow you to angle it down by 30°. It eliminates the stress of not having the water hit where you want it to after installing a new showerhead! Purchased from ST on Mercari. I have two of these, so with the seller's permission, I am selling one. I will clean and disinfect it before shipping, but it is still a used item. If you are interested, ST also had various convenient goods, so please take a look at those as well.