This part is the replacement adaptor pump assembly, also known as the check valve and hose assembly for your dishwasher. It is made of white and brown plastic, and is approximately 4 ½ inches long, 1 ¼ inches wide and the opening at the top is about an inch in diameter. The adaptor pump assembly connects the sump and the drain pump, and prevents dirty water from getting back in. If it cracks, it can cause a water leak, and will need to be replaced. This part is sold individually and is an authentic OEM part sourced directly from the manufacturer.