JSP AEB010-0AY-800 Sonis 1 Overmoulded Small Cup Ear Defender SNR 27.The Sonis range of ear defenders have been designed by the JSP R&D team. Working with a leading UK acoustic engineering research facility they have developed an ear defender range that peaks at an unbeaten 37 SNR.SNR 27. Low attenuation small cup 80-107dB.Suitable for; Moderate industrial noise, Workshops, Printing works, Landscaping, Leisure activities.Hygienic with colour coding for easy selection.