This Brasstech vessel mounting ring is a two-piece set with a round shape and a diameter of 3 inches. It is made of brass material and is suitable for use in a vessel sink. The item diameter (interior) is 2-3/8 inches and it comes with a mounting ring set. This unit is perfect for those looking to upgrade their plumbing and fixtures, and it is manufactured in the United States. The finish of the unit is black and it is sold as a single item.