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2018-10-22u2002·u2002Electrical Nonmetallic Tubing (ENT). Electrical nonmetallic tubing is a pliable, corrugated, circular raceway made of PVC. It's often called 'Smurf Pipe' or 'Smurf Tube,' because it was available only in blue when it originally came out at the time the chil-dren's cartoon characters 'The Smurfs,' were most popular. • Article 376.
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