Ezdiyworld-400pcs B Crimp Wire Glue Filled Bean Type Connectors 400pcs B Crimp Wire Glue Filled Bean Type Connectors B-Connector, plastic coated, metal crimping connector, silicone filled, Blue Our quality "B" connectors are manufactured from the finest materials. They feature insulation piercing internal teeth, soft brass (easy to squeeze) crimp, a durable protective outer covering, and contains a corrosion resistant silicone gel filling.