• Converts Xtreme Garage™ chain drive garage door openers from 7ft. to 8ft. tall door
  • For installation of garage doors up to 8ft. tall
  • Works exclusively with Xtreme Garage™ door openers
  • Includes: Extension rail, extension chain, cable extension, chain master links, and installation instructions

Designed to work with the 425-1670 and 425-1620 Xtreme Garage™ chain drive garage door openers.

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