ZF bag air filter material 1).ISO/SGS/RoHS approval 2).Nontoxic, ordorless, disposable 3).Small resistance, high efficiency ZF bag filter materialsProduct description: ZF big filter materials ... bag filter more uniformly and durable, less resistance, making a beautiful and practical filter. Product property:1). Nontoxic, odorless, disposable2). Small resistance, high efficiency ...