S code Width 2.5cm Shortest 35cm Longest 43cm Telescopic range 8cm
M code Width 2.5cm Shortest 40cm Longest 48cm Telescopic range 8cm
L code Width 2.5cm Shortest 45cm Longest 52cm Telescopic range 8cm
XL code width 2.5cm shortest 52cm longest 60cm telescopic range 8cm
In order to avoid Due to the long distances, the goods were squeezed during transport, the collar was lightened and the battery was exhausted, we add an insulating film into the case, that the collars will not be light even be squeezed, but when you use, you need to pull out the insulating film.