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Automatic Roof Vent Opener ,Up to 30lbs

$35.50

  • Automatic Window Opener Prevent hobby greenhouse overheating
  • Auto Open/Closed.The greenhouse window opener does not consume any power, no batteries or electrical power needed
  • Ideal for your greenhouse window, wall and hobby vents in higher wind situations
  • Starts opening between 59 - 77°F, Replaces manual vent arm
  • Screw directly into polycarbonate panels, wood, or metal frames.