basically if they say njs on them they are the small (5mm) ones, and if they don't then they are the larger (8mm) ones. everyone seems to make this mistake, myself included.
Wish I read this thread before I bought some 5mm ones last night. D'oh!
Edit: gonna try & take mine back but if CONdor don't let me, I too could have some FS.
Edit: gonna try & take mine back but if CONdor don't let me, I too could have some FS.