F9 (diameter 3mm)
F10 (diameter 3.5mm)
F12 (diameter 4mm)
F13 (diameter 4.5mm)
F15 (diameter 5mm)
F16 (diameter 5.5mm)
F18 (diameter of 6mm)
F20 (diameter 6.5mm)
F21 (diameter 7mm)
F22 (diameter 7.5mm)
F24 (diameter 8mm)
F26 (diameter 8.5mm)
10 different size for choose one， if you need choose size please leave a mark ，dont choose one will be random send one， pls understand.
Notice:Size of manual measurement， a slight error is a normal phenomenon
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