... 99.8%3) Service life can be up to 2000h.4) Filter material : fiber paper of pure wood pulp of USA ... in air inflow and large dust holding capacity.4) Put the filter in dry and ventilated place.Ingersoll Rand air ... on 1all our products sizfilter, water filter, oil filter, carbon filter, acid filter, oil purifier, filter bag, bag filter, filter cartridge , filter equipments etc.Reason 4Shanghai Baosteel ...