Silicone Mobile Phone Earplug 1. Weather resistant. 2. High quality,good performence. SpecificationsSilicone Mobile Phone Earplug 1. Weather resistant ... . 2. High quality,good performence.Silicone Mobile Phone EarplugMaterialSBR, Neoprene( ... CR), Nitrile(NBR), Natural Rubber(NR), EPDM, Silicone, FKM, HNBR, IIR, ACM etc.Hardness50-80shore ...