... Filters: 1. Fireproofing 2. RoHS Compliant 3. UL certified Medical Custom Air Filters: Products featuresHigh dust holding,low pressure drop, ... ,OHSAS 18001:2007FinishingBlack oxide coating or follow customer's demandApplicationIndustrial,medical,telecom,electronics,networking,communications,HAVC,broadband/CATV.,etc