Spiral lock seam duct

  • SMACNA RL-1 spiral seam
  • Evenly spaced integral seam locking feature
  • Multiple corrugations on all duct 8″ diameter and larger
  • Standard length: 120″
  • Built in accordance with the latest SMACNA HVAC Duct Construction Standard for +10 iwg
  • Available in diameters 3″- 60″