Supply Air Conditioning Filter Media , Synthetic FIber 1.White color 2.Gram Weight 180- ... 320 g/m2 3.Thickness,5-25mm Supply Air Conditioning Filter Media , Synthetic FIber Features1.Using polyester, polyamide, nylon, etc. chemical ... pollution, filtration of fresh air, pre-filtering prior to medium-efficiency filter, as well as filtration of return air in central air ...