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All Weather Durable PVC Vinyl plastic resin
Snow load of 31 lbs/sq ft and wind load of 75 mph
moderate hail
and resistance to the elements
Strong aluminum frame construction with thick gauge
Alton | Thermofor Louver Window Opener Piston Replacement steel garage All Weather Durable PVC VinylThe 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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