I use this for vermicomposting - creating worm tea and separating my worms from the castings. This works perfectly for that purpose. The classifier is made of very thick, durable plastic, is still very light and the deepness of this classifier is what I really wanted. The others are more shallow but this one extra deep so things stay inside.
What I do is place my worms and the castings inside, run water through it. The mesh is small enough that the water liquefies the castings so it creates a worm tea but the red wigglers (even the wisps) and cocoons still stay inside. This %2330 mesh will NOT work for dry castings - the 1/4 and/or 1/8 inch will work better for that.