Mesurement Conversion Table

To facilitate the application of our endotherapy instruments and the conversion of the measurements, we have worked out the table on the left.

 

Remark:
For correct fit the diameter of the instruments should be smaller than the working channel of the endoscope by minimum 0,2 mm.

CharriPre (CH) French (F) diameter in mm Inches
21 7,00 0,28
22 7,33 0,29
23 7,67 0,30
24 8,00 0,32
25 8,33 0,33
26 8,67 0,34
27 9,00 0,35
28 9,33 0,37
29 9,67 0,38
30 10,00 0,39
31 10,33 0,41
32 10,67 0,42
33 11,00 0,43
34 11,33 0,45
35 11,67 0,46
36 12,00 0,47
37 12,33 0,49
38 12,67 0,49
39 13,00 0,51