●Product Contents: Tip repair top guide (pipe inner diameters 0.04, 0.05, 0.05, 0.05, 0.06, 0.06, 0.06 inch (0.9, 1.2, 1.4, 1.6 mm), total of 20 pieces ●Ring Inner Diameter: All 0.1 inch (2.8 mm) (5#) ●Material: Frame: Stainless steel; Ring: Ceramic ●See 2nd image for detailed measurement ●This is a top guide set with 4 different sizes. With 1 set, you can conveniently repair, replace and make your head tips