At SRM,
Jamie and
Summer are listed as 18. I saw Summer once and the session was below average. No massage skills, no body slide skills, and restrictive (with me at least). But she looks young.
Lily,
Maria, and
Rose are listed as 19. I've seen Lily and Maria and they both look young too. Lily does extras, Maria doesn't (YMMV again), but Maria is very sweet and sensual. Lily is friendly too, but more of the cool chick type.