sheet drain,drainage mat product: HW-PSD15 Color of under plate: Black/White Material quality: High Polystyrene Quality(g/):720 Thickness (mm): 15 Compressive strength (kpa): 300 Color of Geotextile Membrane : Black/White Material quality : Polyester fiber Hole caliber (mm) : 0.15 Runoff rate : 320 Tensile strengthN : 160 Quality(g/) : 150 Specification of Drain Boardmm: 1200×16660 Flow rate (Loss 5cm) (L/S) : 1.6 Flow rate (Loss 10cm) (L/S) : 2.2 The HW-PSD15 Drain SHEET not only in function, but also in economic is efficiently than other traditional filter. HW-PSD15is suitable for the bulkhead, the basement, the tunnel, the pitch, the flowered trough, the platform and so on.