Unaffected by water, chemicals, vibration or dirt The Weathertight connectors are molded from a special nylon material to withstand temperatures from -40 Degree to +257 degree Fahrenheit and are indexed to prevent mismatching. MSD Weathertight Connector, 2-Pin , Qty 1 8173 | Blue Oval Classics Msd 8171 Weathertight 4-pin Connector Wiring Diagram 4 Pin Weathertight Sealed Connector - Connolly Marine Vibration Resistant Plug Withstands temperatures from -40 to 257 degrees Fahrenheit Positive locks w/click If you need electrical connectors that are unaffected by water, chemicals, vibration, temperature or dirt, and that will not come apart accidentally, then you need MSD Weathertight connectors. Unit has self-lubricating silicone seals Buy MSD Electrical Wiring Connector Deutsch 12-14 Gauge/4-Pin 8187 Each terminal tower utilizes self-lubricating silicone seals for protection against water, dust, oil, and other engine compartment fluids.