This product contains 1 set of 10 tube brushes with varying diameters. The diameters for these 10 brushes are 2, 3, 4, 5, 6, 8, 12, 16, 20, and 24 mm (1/16, 1/9, 1/6, 1/5, 1/4, 1/3, 1/2, 2/3, 3/4, and 1 in). All brushes are 8 inches long, dishwasher safe, and constructed with stainless steel and nylon …