the needles have letter on the top of them blunt end.
pilots go in size of 2-5 ish
45, 48,50, 52, 55, 58, 60
mains are
145, 148, 150, 152, 155, 158
stuff like that.
if they are new pj the needles are ceg and i had a bitch of a time jettint with them. cel, cek, dek, del were lot easier to jetting imo.
sudco.com has charts and that where to order new stuff from.