The washer is black in color and works in conjunction with the fill hose in your washer. This washer helps by creating a watertight seal to avoid leaking. Over time the washer may be worn down or damaged which will allow water to pass through and start leaking and will need to be replaced. This part measures 1-1/16” x 5/8” and is made of rubber. This is a genuine OEM part and is sold individually.