| Optical class 1 lens for prolonged use. Modern slim design . Wide adjustable strap for comfortable fit. Pivoting ratchet for individual adjustment and fit . Additional protection against gas and fine particles . Can be worn over prescription spectacles ? Weight 99g. Suitable to use with 3M 7500 series halmasks. 3M EN166 3 4 5 9 BT CE 2C-1.2C 3M 1 BT 9 K N | ||||||||||||||||
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