a.k.a. xylem stick...if i not wrong...i have actually heard and
use xylem stick many times but dunno how the word is being spelled
and this post is my first encounter with the word.... 
....anyway it's a stick with many different
colours blue, red, green ,yellow etc. it's used as a marking for
this and that....red for danger/pit hole, blue for okay proceed
blah blah blah. In the case of armor...they use by VCs to direct
vehicle in night time....
