(1)、The fiber diameter:5.5um (2)、longitude the density root:20±1/10mm (3)、latitude the density root:20±1/10mm (4)、quality:620g/m2 (5)、thickness:0.58mm (6)、longitude:1800 N/25×100mm (7)、latitude:1600 N/25×100mm (8)、intensity of break:≥3.2MPa (9)、permeability:150-200dm3/m2/s (10)、application:300m3hot stove