Part No.  TUBE OD  THREAD NPTF
PM220404S   5/32"    5/32"
PI220606S   3/16"    3/16"
PI220808S   1/4"     1/4"
PM220808S   5/16"    5/16"
PI221206S   3/8"     3/16"
PI221208S   3/8"     1/4"
PI221210S   3/8"     5/16"
PI221212S   3/8"     3/8"
PI221616S   1/2"     1/2"