All of my connector pigtails are sold with OEM quality terminals and seals. Wire used is mil-spec tefzel wire, common in aviation & motorsports, which is made of tinned copper strands. This allows for better corrosion resistance, excellent conductivity & makes repairing/soldering much easier. The wire has a Teflon like insulation that is extremely durable compared to standard automotive grade wire. Most connector pigtails sold by others do not offer these properties