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Old 08-03-2017, 05:47 PM
  #15  
time_to_relax
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Join Date: May 2013
Location: Raleigh, NC & Beaufort, NC
Posts: 1,501
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Originally Posted by Bluebell38 View Post
http://www.thehulltruth.com/attachme...4&d=1501806019

Does anyone know the purpose of the bump in the center of the tunnel?
Deflects waves to eliminate tunnel slap / sneezing / etc. I "think" most cats have them these days.
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