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Bred by Johnny's
Seeds and accessories are bred and developed by Johnny's Selected Seeds.
Product ID: 9033
Keep your plants in their "comfort zone".
This temperature-responsive automatic opener is specially designed to automatically open and close bifold covers on cold frames. Set it to open between 60°F and 77°F to keep the temperature inside the cold frame from overheating.
Univent Automatic Opener | Installation Instructions
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