The 12065287 is a red cavity plug designed to seal unused connector cavities, providing environmental protection. It is specified for use with the CTS 2.8 Sealed Series and the ErgoMate™ 38 Way connector systems. This plug fits into 2.8mm cavities and does not feature a restraint ring. Using this cavity plug helps maintain the integrity of the sealed connector system by preventing the ingress of moisture and debris in applications such as on-engine sensors.