Sand Washer Magnetic Sepatator Dredger 3 1.dredging sand 2.washing sand 3.selecting iron 4.dredger in river Sand Washer Magnetic Sepatator Dredger 3Sand Washer Magnetic Sepatator Dredger. Serial numberPrincipal ParticularsDimensions/Instruction1Principal Dimension Length20mWidth(single)1.7mThickness of bottom and side steel plate5mmThickness of face steel plate3mm antiskid plateMaterial Inner: 5# ...