Made of soft forming polyurethane, permanent seal, particularly excellent skin-friendly, conical shape for optimum adaptation to the ear canal en 352-2 snr = 37 db, (a) h-value = 36 db, (a) m-value = 34 db, (a) l-value = 33 db(a) scope of supply: and 50 pcs. Improved version for clearer understanding and better search visibility. Suitable for users seeking detailed and reliable product information.