BFA Beryllium Copper Banana Plugs with Insulation Caps

The Mundorf MConnect Beryllium Copper Banana Plug is very well designed. The 4mm banana fits snuggly into its red or black thermoplastic polymer housing, the hatch of which snaps into place. The banana plug has an external lip that the speaker wire can be easily soldered too without disturbing the hollow plug. Once the housing is fitted, and its opening closed, another plug and be fitted into the top so you can actually stack connections. There is a 2.5mm diameter opening in the top for the speaker wire, however, you can fit cables up to 4mm in diameter if you don't use the strain relief or the actual cover.