This is a replacement, magnetic rubber eyecup for Pulsar Thermion, Talion and Digex thermal riflescopes. The eyecup is meant to provide the correct eye relief for Thermion, Talion and Digex series to prevent splashback from the display at night. It is compatible with all Thermions, including XM, XQ, XP, XG models and the Digex series. Talion models XG and XQ.