Ballasts for xenons - Same both sides?

[Shaun!]

Just called a breakers yard, as I need a ballast (already got 1, but nee a 2nd replcaement) and the girl asked me which side it was for??

Are they diff both sides? as the otherone I bought the guy just handed me it as if they're identical ?

 

[Hitty86]

both the same, atleast they are on mine

 

[Shaun!]

thats good. pig to get hokd of though?