Cut grains Aquifer | Cut grains of the gravel filters | Cut openings of the well screen |
0.1 to 0.6 mm 0.2 to 0.8 mm 0.3 to 1.2 mm 0.4 to 2.0 mm 0.5 to 3.0 mm | 0.7 to 1.2 mm 0.1 to 0.5 mm 1.5 to 2.0 mm 1.7 to 2.5 mm 3.0 to 4.0 mm | 0.5 mm 0.75 mm 1.00 mm 1.50 mm 2.00 mm |