... 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 ATemperature-60c ... your requirementsDelivery DetailDepends on your quantity We can produce various dimension and color according to customers' requirements, OEM ...