The DL-4B quadruple glass filtration device is a reference to similar foreign products. The product mainly consists of a cylindrical graduated funnel, a sand core filter, a specially designed clamp, a vacuum system, and other parts. This product is made of high-quality silicate and can withstand hot pressing and debinding. The flange mouth is finely polished, with good sealing performance, reasonable structure, beautiful appearance, smooth surface, environmental protection, easy cleaning, corrosion resistance, convenient use, and durability. It is a commonly used equipment in colleges, research institutions, pharmaceutical factories, hospitals and other units for filtering culture media, blood products, medicinal liquids, microorganisms and particles, and suspended solids in water quality.