This graders are made of aluminium and stainless steel and are available for various fresh and sea water fishes from Salmoniformes and Cypriniformes to Perciformes etc. The grading technology is based on 2-5 V-shaped channels with moving plastic fingers below, which moves the fish until the channel is too wide for the fish thickness and the fish are released to the collecting tanks below, from where they are flushed with water to the outlets, and additionally by pipes back to the holding ponds. During the whole grading process the fish are keept wet by water. The machines are mounted on a trolley with 3 wheels. Equipend with 380 V/50 Hz motor (230 V on request).