Cup Brushes with Shanks are the perfect brush for cleaning valves or parting line work! Cup Brushes with Shanks are available in a variety of materials including brass, nylon and stainless steel. The shank can be used for cleaning valves or parting line work. Our Cup Brushes with Shanks are the best way to clean valves and parting lines quickly and easily. You won’t find a better brush on the market today. Order yours today!