Lemo, mini-lemo: Circular connectors, also called "push-pull" or "quick connect/disconnect", are commonly used in non-destructive testing (ndt), physics, and aerospace, on transducers, flaw detectors, and other applications. This style of connector was pioneered several decades ago by the swiss connector manufacturer lemo. Because of this history, practitioners in the industries that use this connector style still tend to call this a "lemo connector", even though there are now multiple manufacturers making compatible connectors. "lemo" is a registered trademark of lemo usa. We source our connectors from multiple vendors. The connector we provide to you may be made by lemo, or may be a compatible model from an aftermarket manufacturer. Our circular connectors come in two different sizes. The l00 connectors have a diameter of roughly 0.25", and are often used in physics and engineering applications for interconnection between nim/camac modules. If you are looking for the larger 0.5" diameter connector