1970UL 181B-2021 Closure systems for use with flexible air ducts and air connectors
2017UL 181B BULLETIN-2017 UL Standard for Safety Closure Systems for Use with Flexible Air Ducts and Air Connectors (COMMENTS DUE: March 20@ 2017)
2014UL 181B BULLETIN-2014 UL Standard for Safety Closure Systems for Use with Flexible Air Ducts and Air Connectors (COMMENTS DUE: OCTOBER 30@ 2014)
2013UL 181B-2013 Closure systems for use with flexible air ducts and air connectors
2012UL 181B BULLETIN-2012 UL Standard for Safety Closure Systems for Use with Flexible Air Ducts and Air Connectors (COMMENTS DUE: October 08@ 2012)
2007UL 181B BULLETIN-2007 UL Standard for Safety Closure Systems for Use with Flexible Air Ducts and Air Connectors (COMMENTS DUE: October 01@ 2007)
2005UL 181B-2005 UL Standard for Safety Closure Systems for Use with Flexible Air Ducts and Air Connectors Second Edition; Reprint with revisions through and including February 13, 2008.