... seive 30g Copper filter dryer Copper filter dry are made of good quality copper pipes and copper thread backstops ... ,and topgrade moleculr sieves.It is adaptive to R12,R134a,R502 and refrigerators using capillary tubes for ... jam in the systems. .Features1) Copper filter driers (Copper Strainers) for refrigerators, freezers, air conditioners And compressor ...