This upgraded Splitter waterproof degree is IP67,which mean it is durable and stable enough.You needn't change it too often. Stable self-locking system which is easy to lock and open. This Splitter body made by professional photovoltaic plastic material for anti-aging and resistance to ultraviolet radiation CE and TUV certified Hard plastic, good material make sure the transmission in the stable situation. Quick and simple assembly processing.And it compatible with all MC4 solar connector < branch connectors or Y/T connectors> Specifications: Water proof and dust proof Rated Current: 30A Insulation Material: PA/PC Protection Class : Class II Flame Class: UL94-VO, UL94-VA Temperature Range: -40 Centigrade to +90Centigrade Contact Material: Silver Plated Copper Contact Resistance : < 0.5 milli ohms Protection Degree: IP67 IP2X (unmated) Maximum Voltage: 1000 VDC (600 VDC UL) Wire size range : 10, 12, 14 AWG (6 mm2, 4 mm2, 2.5 mm2) Complication : Compatible with all MC4 solar connector < branch connectors or Y/T connectors> Package Included: 2 x Branch Male/Female/Female 2 x Branch Female/Male/Male