Usage Tips:20A in-line Diode Connector Solar Panel cable Connectors Practical and easy connector used between Solar panel and switch box to prevent the reversal of current. Contacts for the connector are copper, coated with tin for easy solder adhesion. Each end nuts comes with rubber bushings for air tightening. This connector is rated as IP67. IP (Ingress Protection) ratings the first numeral refers to the level of dust resistance and the second numeral refers to the level of water resistance. Specification: Connector Material: PPO,PC Degree of protection:IP67 Rated current :20A Flame class :UL94-V0 Rated voltage: 1000V(TUV)and600V(UL) Test voltage: 6kV(50Hz,lmin) Insertion force/withdrawal force: Less than equal 50N/ Greater than equal 50N pin dimensions: F4.0mm Connecting System: Crimp connection Contact resistance of plug connector: Less than equal 5mOhm Temperature range: (-40 Celsius - 85 Celsius) Contact material: Copper, Tin plated Highest Temperature: 110 Celsius Insulation material: PPO Package: 4 x PV Diode connector Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.