Description:Easy to put on and take off Prevent dust and debris from entering the port when it is not in use.Prevent the contact point of the ports oxidized and causing contact problem.Designed to fit into all Ethernet Port RJ45Item: RJ45 Anti Dust CoverFit for: for RJ45 Female JackColor: BlackMaterial: SiliconeNet Weight: 1g Package includes:100Pcs*RJ45 dustproof plug