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