Tubes and horn are the other names I've heard for those.
CMJ - KCBS & NCBBQA
CBJ - MBN, NCBS, NCPC, & SBN
OBJ - BBQCritic.com
CTC - KCBS
Pitmaster and chef - "4 Lil' Pigs" Competition BBQ Team
Author of "A 'Q' Review"
Lang Hybrid Smoker, BDS, & Holland "Epic"