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3M H520AC1 Peltor Optime II Comfort Earmuffs, Black, (94-105 dB) & 3M Peltor Optime I Earmuff H510A; Hearing Protection against noise levels in the range of 87-98 dB (SNR 27dB), yellow :
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3M Peltor Optime II Ear Muffs, 30 dB, Helmet Mounted, H520P3A-410-GQ - Green : Amazon.co.uk: DIY & Tools
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