Replacing accesary wrench is included. more flow. If you're on a well or have very low water pressure, these aerators will actually aeration.stuffed full be prepared for the water to rush out nearly unimpeded No spraying all over. Shaping the water out of the spout. Standard Size, General replacement part, check your aerator size purchase To be More Healthy. Replace the old and impeded and disgusting aerators to have clean, clear water to drink. Item No.: Bubbler and Wrench size:18.5Mm Material:ABS colour:Blueandblack Package Contents: 3 x aerators 1 x wrench Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.