Proper material for furnace exhaust venting

[Jody Humbert]

Could not find any labeling on this flexible ducting for thickness or if it's rated for this use as furnace exhaust ducting. What do you think of this and how would you report it? Thank you in advance for any comments.

[Jake Guerrero]

Looks like Simpson Dura Connect

Simpson Dura-vent (http://www.duravent.com/?page=5b.php)

DuraVent Type B Venting Installation Guide (http://www.efireplacestore.com/duravent-type-b-venting-installation-guide.html)

[Billy Stephens]

Looks like Simpson Dura Connect

Simpson Dura-vent (http://www.duravent.com/?page=5b.php)

DuraVent Type B Venting Installation Guide (http://www.efireplacestore.com/duravent-type-b-venting-installation-guide.html)
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Or Magnaflex Industries, Inc (http://www.magnaflex.us/products.htm)
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