'• PS material

• Good airtightness, culture medium will not dry out after 5-7 days of incubation

• Inner diameter of 55mm, the effective surface area of culture medium is 25 cm2, in line with the new version of GMP surface microbial sampling requirements

• The bottom grid, easy to count colonies; raised bright line, conducive to culture medium adhesion; step design, convenient to open the dish lid

• Bottom curved projection, so that the maximum contact area between the culture medium and the plane is not easy to fall off

• Unique latch, so that the lid and flat dish is not easy to loosen, but also to ensure the permeability