Thermal Expansion Wax refrigeration, auto-control system, automobile industry, petrochemical industry. Thermal Expansion WaxAutomatic Temperature Regulating Agent Low Temperature SeriesModel NumberAppearance(Normal Temperature)Quality StandardRange of Temperature ControlEffective DistanceTravelWater-Solubility Acid and AlkaliMechanical ImpurityA13Powder, Cream13/266Non.Non.A15Powder, Cream15/ ...