Banana Plug Cover / Insulator

This is a cover for a std. 4mm male banana plug. It slips over and completely covers the metal portion of the plug. The lower part is just over 4mm for a snug fit, while the top part is as wide as possible to allow for tapered plugs, etc.

I often have test leads connected at various points in a circuit and swap them in and out of my DMM or scope. With this, I can safely insulate the other end of the lead that's unplugged from my DMM/scope (but still connected to the circuit on the other en