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Automatic Vent Opener - Standard Replacement Cylinder - SEF111

Greenhouses

Greenhouses

Cold Frame and Hotbed Gardening

Cold Frame and Hotbed Gardening

$19.99
  • In stock. Ships from our warehouse in Northern California.

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While the material within the Vent Opener lasts a long time, eventually it can lose its ability to expand and contract and it will be time for a replacement cylinder. Use only with the Standard Vent Opener.

  • Item Model Number: SEF111
  • Shipping Dimensions: 11.75 x 0.5 x 0.5 inches.
  • Shipping Weight: 0.5 pounds.
Related Content from ourGrowOrganic... for Life!

September 7, 2012 - Charlotte from Peaceful Valley
Use manure to turn a cold frame into a hotbed Warm up your cold frame with help from your friendly neighborhood horse. Horse manure will raise the temperature in a cold frame, and our automatic vent openers will keep the cold frame from over-heating.… read more»
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