High quality products using RD/RE tube type filter (Tube Filiter PTF:Porous), more than 3 m above the removal of foreign body above 98%, the content of impurities in the melt is less than 0.08mm2/kg.
The porosity is very small;
The aluminum melt by very slowly;
The filter tube itself very high strength, not because of the looseness of substrate into the product.
