Mundorf BFA Insulation Cap - Black
The Mundorf MConnect Beryllium Copper Banana Plug is well designed. The banana plug slides into its red or black thermoplastic polymer housing, with a hatch that snaps into place. Speaker wire can be soldered to the banana plug's external lip without damaging the hollow interior. Another plug and be fitted into the top so you can stack connections. There is an opening in the top for the speaker wire. If the strain relief or the real cover are not used, you can accommodate wires up to 4mm in diameter.
Made for 4mm banana plug
Material: Thermoplastic Polymer
2.5mm Diameter Opening
Can fit Cables up to 4mm