The spcification as belows:
Basis Weight:135±5g
Filter paper width (height) available: 80mm-1600mm;
Thickness: 0.35-0.55mm
Diameter of the roll: around 76cm , also produce according to customers'need
Air Permeability :100-650L/m2. s
Corrugation Depth :0.25±0.05mm
bursting strength>=340kpa   
Maximum Pore Size: 40um-120um
Resin Content :16%-28%
Plain paper or corrugated paper as requested
All colors can be produced and technical data can be adjusted as customer request.
Inner packing: Plastic film, Outer packing: Kraft paper and paper board, also packing according to customers'need