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3" X 35' DuraVent DuraFlex Double-Wall Aluminum Chimney Liner - 3DFA-35

Item: COP68805
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  • Provides combustion air and exhaust venting for gas appliances
  • Clearance to combustibles mandated by appliance listing
  • The components twist-lock together for a quick, secure, fastener-free installation
  • 0.020" aluminum inner
  • 0.018" steel outer
  • Offsets venting obstructions