Material: food grade polypropylene non woven felt-needle punched felt

Micron rating: 0.5-200μm

Features: 3D space inside ofnon-woven fbers, capture small particledirectly, high efciency, low cost, large capacity of dirty particles,excellent air permeability.

Material: polypropylene extended life felt

Features: made by more micro fiber. Dirty capacity can be 4 times thangeneral felt. Longer life time, Larger capacity.