Black Round Toilet Seat

toilet seat
Toilet seats are detachable, ringlike seats of plastic hinged to the top of a toilet bowl. They should be cleaned and disinfected daily using proper disinfectant-cleaner to prevent the spread of germs. Some toilet seats have a lid attached and others do not.
the hinged seat on a toilet
(Toilet Seats) Most toilets do not include a seat. They are available for round or elongated shaped bowls, regular or contoured for more comfortable seating. They also come in many finishes such as wood, molded composition, cushioned vinyl, plastic or polypropylene.

black
the quality or state of the achromatic color of least lightness (bearing the least resemblance to white)
blacken: make or become black; "The smoke blackened the ceiling"; "The ceiling blackened"
Make black, esp. by the application of black polish
being of the achromatic color of maximum darkness; having little or no hue owing to absorption of almost all incident light; "black leather jackets"; "as black as coal"; "rich black soil"
Make (one's face, hands, and other visible parts of one's body) black with polish or makeup, so as not to be seen at night or, esp. formerly, to play the role of a black person in a musical show, play, or movie

round
Give a round shape to
Pass and go around (something) so as to move on in a changed direction
wind around; move along a circular course; "round the bend"
Alter (a number) to one less exact but more convenient for calculations
a charge of ammunition for a single shot
from beginning to end; throughout; "It rains all year round on Skye"; "frigid weather the year around"