DESCRIPTION FOR ORDERING
First two numbers — Designates air terminal diameter
Second two numbers — Designates air terminal length
Prefix A — Designates Aluminum
Prefix C — Designates Copper
Suffix TH — Designates Threaded
Suffix TF — Designates Tubular Flat
Examples:
A5812THAluminum 5/8″ X 12″ tube air terminal with threads
C5818TFC5818TF Copper 5/8″ X 18″ tube air terminal with 3″ flat surface
C5818TFC5818TF Copper 5/8″ X 18″ tube air terminal with 3″ flat surface