DESCRIPTION Product Code: JSPSONIS3E Model Number: SONIS3E Brand: JSP Barcode: 5038428261944 Sonis® 3 Overmoulded Large Cup Ear Defender SNR 37. 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 37. High attenuation large cup 112-117dB. Suitable for; Extreme industrial noise, Aircraft, Quarrying, Paper mills, Heavy engineering. Hygienic with colour coding for easy selection. KEY FEATURES - High attenuation large cup 112-117dB - For extreme industrial noise - Aircraft, Quarrying, Paper mills, Heavy engineering. - SNR 37dB - Colour coding for easy selection