The fish grading box is made of strong plastic, the grid of box is round and smooth, has no sharp edges that harm fish, it is suitable for fresh water and saltwater fish fingerlings grading and sorting works.
The diameter of the grading box is 570mm, the grid size can be: 3mm, 4mm, 5mm, 7mm,10mm, 12mm, 15mm, 17mm, 20mm.
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