The cast aluminum filter is woven with special high-twist, high-strength, alkali-free glass fiber and specially treated. It is specially used for aluminum water filtration. It has a maximum temperature resistance of up to 900 degrees and is widely used in automobile and motorcycle wheels, steering knuckles, cylinder heads, and pistons, precision casting filtration of aluminum ingots and aluminum alloy parts, which can effectively remove bubbles, slag inclusions, etc. in the aluminum industry, greatly improving product quality, and is the most economical material for filtration of aluminum alloys.