ALFI brand ABUMSB Undermount Farm Sink Installation Kit with 39-Inch White Metal Rods If you don't purchase this kit you will need to create your own support for the sink using 2x4's or other metal rods it is definitely possible, this kit simply makes it quicker and easier This kit helps maintain aesthetics under your sink by taking up much less room than wood support and looks neat and white Highly recommended to make your sink installation quicker and nicer looking