The hose clamp works in conjunction with the water hose in the appliance by holding the water hose in place to keep the hose from leaking water on to the floor. If you notice your appliance leaking, you may have a crack in the hose or that the clamp is loose and will need to be replaced. The hose clamp is made of metal, measures approximately 1/2” in diameter and sold individually. This is a genuine OEM part.