ordering from scooter attack

just a few questions before i order some stuff
1. how do i know what size rollers im buying and what size do i need?
2. i want to use my open air filter so do you think i should get the set of jets that end at 82 or start at 80??
3. are these lense legal http://www.scooter-attack.com/index2.php?lang=e ?

thanksss

yet again someone who posts a link up to the S.A main page :w00t:

and get the jets that start with 80 for an open filter