Electrically connects a (tap) wire end to a through (run) wire and insulates the connection. Flame retardant. Self-stripping. Used for tap splicing. Dual element connection. Maximum insulation O.D.diameter of 0.145 inches (3,68 mm) Tap, 0.190 inches (4,82 mm) Run and a operating temperature of 221(deg)F (105(deg)C). The suggested application tool for this connector is the E-9BM Crimping Tool.