Pulsar PSP-56 Ring Adapter for Krypton & Proton Models (PL79176) is a precision-crafted accessory made from durable aluminum alloy. Designed exclusively for 56mm objective lenses, it allows secure and quick attachment of Pulsar Krypton and Proton thermal imaging devices to compatible daytime optics. The adapter features a quick-release mechanism for fast and reliable installation and removal in the field. Pulsar PSP-56 Ring Adapter for Krypton & Proton Models PL79176