serving string

[steerwrestler]

i'm lost i bought a new bow and i am going to put the peep site on my self but i was looking for the right serving string what do the numbers stand for like the string i was looking at was num.4 serving string would this do it

[akaSharkey]

I use BCY #62 serving. For putting a peep in you can use anything. Dental floss will work fine.