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Automatic Vent Opener - Standard Replacement Cylinder

Item Number: SEF111


In Stock! Ships from Northern CA.


In Stock! Ships from Northern CA.

Buy Big, Save Big! As low as $17.99 each!
  • Buy 10 for $17.99 each and save 11%


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.

Videos & Articles



September 7, 2012 - Charlotte from Peaceful Valley
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 »

Shipping Information

Shipping Weight: 0.20 lbs. Dimensions: 11.75"L x 0.5"W x 0.5"H


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