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Ships within 48 hours · Estimated delivery Sep 8 - Sep 13
Note: this item is not available separately
8mm double-wall (twin-wall) polycarbonate sidewalls: Provides insulation
so it requires no power source
10-year manufacturer warranty ensures long-term peace of mind
No warm-up time
Alton | Thermofor Louver Window Opener Piston Replacement RV Carport Note: this item is notThe Thermofor Louver Vent Replacement Cylinder is designed to restore smooth, automatic operation to your greenhouse louver vent opener. Compatible with Thermofor, Robinsons, and Alton branded louver openers, this replacement cylinder helps maintain proper airflow and temperature control without manual adjustment. Inside the cylinder is a heat sensitive wax core that expands as temperatures rise and contracts as they cool. This natural movement powers
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