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Automatic Opener For Cold Frame
Don't worry about a sunny day overheating your plants! Our automatic cold frame opener is just the thing for cold frames and smaller greenhouse windows. The top adjusts to open at inside temperatures of 60-80 °F. Lifts up to 12 pounds, and opens to as much as 17 inches. Temperature activated and needs no external power! Designed for use with the Garden Starter Cold Frame (ZGR319) or similarly constructed products. Cylinder will need to be replaced every few years (see ZGR335 Replacement Cylinder).
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