Tube 8 spacing 5 cm 3.5 kPa (60×120) 4 kPa (60×200) 4.7 kpa (60×240)
Tube 8 spacing 3 cm 5.4 kPa (60×120) 6 kPa (60×200) 6.7 kPa (60×240)
Tube 10 spacing 5 cm 1.6 kPa (60×120) 2 kPa (60×200) 2.6 kPa (60×240)
Tube 10 spacing 3 m 2.2 kPa (60×120) 2.7 kPa (60×200) 3.3 kPa (60×240)
Tube 12 spacing 7 cm 0.8 kPa (60×120) 1.2 kPa (60×200) 1.5 kPa (60×240)
Tube 12 spacing 5 cm 1 Kpa (60×120) 1.5 kPa (60×200) 1.9 kPa (60×240)