When seeking replacements, you'll find this information useful for identifying the spars in your kite(s)...

Just look at the silver (formerly gold) labels on each spar.

1/4" internal diameter: 

2-wrap = Two feathers and/or "Professional Use Only"
3-wrap = Three feathers and/or "Ultra Light"
4-wrap = Four feathers and/or "Revolution Equipped" and/or "Strong"
Race Rod = Flames and "Race"

Other spars:

SLE = Super Leading Edge
Indoor = Indoor Rev