Specification for air&oil filter paper: 
1) Weight: 120-145gsm
2) Thickness: 0.45mm
3) Air permeability (200Pa L/100cm².min): no less than 450
4) Burst strength (KPa): no less than 270
5) Resin content (%): 20~22
6) Maximum pore size: 90
7) Mean pore size: 75
8) Corrugated depth (mm): 0.25
9) Paper color as requested
10) Roll length and roll inner pore diameter as requested
11) Plain paper or corrugated paper as requested

Packing: kraft paper