High performance refrigerator damper without electricity

Damper for Air-cooled Refrigerator DAMPER (AIR-COOLED REFRIGERATOR) General Specifications: Technical Parameter Application Refrigerator Function Open and close the flow of chilly air to keep a set temp by sensing the temp inside the chill room Feature Operate the flow of chilly air mechanically by sensing temp change Product Specification: Model name Operating Temp. (C) Cold Normal Warm Forced Closing Close Open Close Open Close Open Close Open PDC 217 -5.5 -2.5 -2.5 2 2.5 5