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Starting Collars

GSI’s most cost-effective factory sealed fitting for beginning a new duct run from the truck line. Available in three installation styles and multiple lengths to suit virtually every installation need or budget. Yellow Union Label manufacturing is standard on these products.

3" Long Spin-in Collar

  • GSI Collars are designed and tested to surpass SMACNA Class 3 Leakage Standards
  • Pre-sealed with gasket made of EPDM rubber and proprietary co-polymer
  • Zero VOCs

3" Long Tabbed Collar

  • GSI Collars are designed and tested to surpass SMACNA Class 3 Leakage Standards
  • Pre-sealed with gasket made of EPDM rubber and proprietary co-polymer
  • Zero VOCs

6" Long Press-on Collar

  • GSI Collars are designed and tested to surpass SMACNA Class 3 Leakage Standards*
  • Pre-sealed with gasket made of EPDM rubber and proprietary co-polymer
  • Zero VOCs

6" Long Spin-in Collar

  • GSI Collars are designed and tested to surpass SMACNA Class 3 Leakage Standards*
  • Pre-sealed with gasket made of EPDM rubber and proprietary co-polymer
  • Zero VOCs

6" Long Tabbed Start Collar

  • GSI Collars are designed and tested to surpass SMACNA Class 3 Leakage Standards*
  • Pre-sealed with gasket made of EPDM rubber and proprietary co-polymer
  • Zero VOCs

6" Long Press-on Flex Collar

  • GSI Collars are designed and tested to surpass SMACNA Class 3 Leakage Standards*
  • Pre-sealed with gasket made of EPDM rubber and proprietary co-polymer
  • Zero VOCs