Name: Lab Test Sieve Material: Wire Cloth Material is 304 Stainless Steel. Outer Frame Material is Chrome Plating Steel. Size: Diameter 5cm, Height 3.3cm. Mesh Count: 325. (0.045mm Aperture) Mesh Count is the quantity of the hole in 1 inch. Mesh count 325, means the hole size approximately to 0.045mm. The larger the mesh count, the smaller the mesh hole size.