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Ships within 48 hours · Estimated delivery Sep 14 - Sep 19
Prefer your workspace in one spot
Maximize your growing area with the Trellising Kit Pro
or larger 11
18-inch x 18-inch square
Emergency Shelter
Alton | Thermofor Roof Vent Opener Piston Replacement all steel shed Prefer your workspace in oneThe Thermofor Long Piston Replacement is a direct replacement cylinder designed for Thermofor automatic roof vent openers used in Alton greenhouses. If your current opener is no longer responding properly to temperature changes, replacing the piston is a simple way to restore reliable, automatic ventilation. This heat sensitive cylinder contains a wax core that expands as temperatures rise and contracts as they cool, driving the vent to open and close
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