Spec Product name: No. 1 JIS P 3801: Type 1 Mass (g/m2): 90 Thickness (mm): 0.2 Filtration time (s): 45 Water absorption (cm): 9 Burst strength (kPa): 79 Wet rupture strength (kPa): 7 Retention particle size (?m): 6 Total ash (%): 0.1 Maximum operating temperature (?): 120 pH Range: 0 to 12 Size (mm): ?150 Quantity : 1 box (100 pieces)