Material: 304 Stainless Steel Outer Frame + 304 Stainless Steel Mesh Screen.(Outer Frame Material also have chrome plated metal, it is cheaper, but just can fit daily household use, if you use it Science Laboratory Test, it is recommend to choose 304 stainless steel.)
Mesh Count is the quantity of the hole in 1 inch. For example: if mesh count is 2, then the hole size will be 1/2inch, approximately equal to 12.5mm. The larger the mesh count, the smaller the mesh hole size
Difference between "Chrome Plated Metal" and "304 Stainless Steel": The color of the chrome plated metal is brighter than 304 stainless steel, The 304 stainless steel is more durable than chrome plated metal.