4mm shrouded cable test plugs truconnect 17 2630 these blue safety sheathed 4mm banana plugs have a straight body and a solder bucket termination with a rigid insulating sleeve and soft ends these plugs allow for a quick and easy termination of a fully insulated banana plug to the insulated wire and will mate with all standard 4mm shrouded banana jackssockets truconnect 4mm shrouded cable test plug blue