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3M (formerly Aearo) H9P3E Peltor Optime 98 Helmet Mount Earmuffs, English, 15.34 fl. oz., Plastic, 1" x 7.4" x 5.1": Science Lab Ear Muffs: Amazon.com: Tools & Home Improvement
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3M™ PELTOR™ Optime™ II Helmet Attach Earmuff H520P3GS/E, Green, Class 5 SLC80 29dB, 10 ea/Case | 3M New Zealand
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