Our products are characterized by great ventilate quantity, good filtering function and excellent toughness. The air permeability, bursting strength, tensile strength and other technical data are above the norm of filter paper industry. Basis Weight:130±5gsm Filter paper width (height) available: 100mm-1600mm; Thickness: 0.45mm Diameter of the roll: around 78cm Air permeability at 200Pa: 350-500 L/m2.s Corrugation Depth 0.25mm Mullen (bursting strength) >=200kpa Maximum Pore Size 75um Volatile Content 3% Resin content 25% Plain paper or corrugated paper as requested Inner packing: Plastic bag, Outer packing: Kraft paper