How to measure the length of the guide bar?

Given the length of the guide bar for the saw is working length.
It is measured from the end ("nose") to start the chainsaw - we omit the length of the tip assembly.

Lengths of guide bars are given in inches and centimeters:

Two first digits in the reference inform about length of guide bar:
np. 158SLGK095 (guide bar 15 inches)

In the case of the harvester guide bars is given entire length - with the assembly tip .