These are very high quality vessel bowls. Excellent match to black/gray granite vanity tops. Installation was very simple - the base has a 5 inch square plate that makes it easy to level and secure the bowl. Comes with a standard 1 1/4 inch pop-up drain connection. Measure carefully though, at 17 inches square, the bowls are large, so make sure you have enough vanity space - not a problem for me, but could be for narrow vanities.