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. The range IP67 rating means that the device is totally protected from dust and can be submerged in water to 1 m (3ft) for up to 30 minutes without any leakage. The ratings were set by the International Electro technical Commission.
Features:
100% Brand new and high quality
This Y Style MC4 compatible Solar Cable Connector Set is a perfect solution to parallel connect multiple panels together.
The Y MC4 Solar Cable Connector Set includes one Y style MC4 cable connector one female to double male (F/M/M) and one Y style MC4 cable connector one male to double female (M/F/F).
Electron-beam cross-linked compounds UV and ozone resistant
Hydrolysis resistant
High temperature resistant, the materials do not melt or flow
Good cold flexibility
Long life cycle
IP67 Waterproof
Specification:
Nominal Voltage: 1000 V DC
Temperature rating: -40 degree ~ +105 degree
Ambient temperature: 25?
Flame Retardant Grade: UL94-VO
Quantity: 2pcs
Color: Black
Length: approx. 32cm