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4 Flame spread resistance
Easy clean
High heat resistance to 300 degrees
Marking Code : SRA
Delta Plus Conic disposable polyurethane foam earplugs SNR 36dB (500 pairs dispenser refill) Walking and hiking footwear 4 Flame spread resistanceRefill pack of 500 pairs disposable polyurethane earplugs, for use with CONICDISPLAY. EN352 2: 2002 Hearing protection : Earplug SNR 36 dB Average noise attenuation H 34 High frequency attenuation M 34 Medium frequency attenuation L 31 Low frequency attenuation 7 12 mm Dimension USA STANDARDS ANSI S3. 19 1974 American National Standards Institute NRR 33 dB NRR (Noise Reduction Rating Noise Reduction Rating) This standard specifies the test method for
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