The connector shield was made of gas phase silicone from BASF. It is a premium silicone with high performance in mechanical property. Gas phase silicone held high tensile strength, tensile strength, and wear resistance. The connector is very durable.
The product is a cover to prevent rotation or rattling of the connector section. It could be compatible to MMCX, A2DC, IE40, etc.
compatible to headphones with a cylinder or a cambered surface which could be fixed into the sleeve