Nylon travellers are subdivided into 2 groups. European Series
and American Series.
The traveller is identified by
- ring depth (in mm or inches)
- traveller weight (in mg per traveller)
- traveller shape
e.g. 16,67 mm 21/32" 500 C.
The code shows a number inserted between two letters or groups
e.g. G 40 C.
The first letter, in our example G, indicates ring depth (43/64"
17.1 mm), the number (40) the weight of travellers expressed
in grains per 10 travellers, the last letter C indicates the
In order to obtain the weight in milligrams per traveller
multiply the grain size by 6.48 (in our example 40 x 6.48
= mt. 259.20)
Whether for the European or American series the suffixes M,/3,/4
indicate that the traveller is reinforced with glass fibre.