Season 4 Episodes13
Cast1

Lynn Herzeg
Narrator (voice)
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Ranked #11 of 13 in Season 4•−0.2 vs season avg
Bristles are inserted and secured in handles and blocks to produce brushes and push brooms, smooth writing surfaces are manufactured into blackboards, salmon is cured and smoked, and interlocking teeth are attached to fabric tape to make zippers.

Lynn Herzeg
Narrator (voice)
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"Brushes and Push Brooms, Blackboards, Smoked Salmon, Zippers" is episode 6 of How It's Made season 4. It scored 7.3/10 from 32 votes, ranking #11 of 13 episodes this season (season average 7.5). It aired on February 8, 2004.