Basic component of a sealed refrigeration system. Its main function is to retain moisture. Suitable for commercial refrigeration applications requiring high drying capacity. Contains desiccant and filter material to absorb all moisture and other contaminants, compatible with CFC, HCF and HFC refrigerants as well as POE, PAG and AB lubricants. Made of high quality and resistant copper tube, with internal filter cap that allows to have a greater capacity of filtering area (2 to 4 times greater than the competition). They are dehydrated in vacuum and heat ovens that guarantee 0.1% of residual humidity, as well as anti-corrosive coating. The use is the best way to protect the thermo expansion valve, capillary tube and compressor from contaminants in the system.