If you are looking ideas of 18 Inch Depth Bathroom Vanity perhaps these following products can give you inspiration.
Some of them include : counter top, sink, vanity cabinet, faucet, p-trap, drain, and mounting ring. They are made of high quality wood frames. They are also fully finished inside/out. Features awesome finish, fashion forward design. Depth of cabinet: 18″. Easy to maintain and durable finish.