Season 6 Episodes13
Cast1

Lynne Adams
Narrator (voice)
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Ranked #5 of 13 in Season 6•matches the season avg
Molten glass is spun into fibreglass insulation, wood is carved and painted into decorative ducks, dispensing mechanisms are installed in gumball machines, and formed metal pipes and mufflers are assembled into automotive exhaust systems.

Lynne Adams
Narrator (voice)
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"Fiberglass Insulation, Wooden Ducks, Gumball Machines, Exhaust Systems" is episode 8 of How It's Made season 6. It scored 7.6/10 from 28 votes, ranking #5 of 13 episodes this season (season average 7.6). It aired on February 22, 2006.