This stainless steel mesh sieve features a stackable black plastic frame and is designated as mesh No. 5, with 4mm openings in the woven stainless steel wire. The mesh size number is clearly labeled on the frame for quick identification when working with multiple sieves in a stack. The sieve measures 2.5" tall with a total diameter of 6.75" and a mesh diameter of 5". It is designed to stack with other Eisco plastic-frame sieves of the same dimensions, making it straightforward to assemble a graduated sieving column for particle size analysis and soil classification work.