One pair of MC4 2 to 1 T-Branch Connectors for solar panels. Includes both MMF and FFFM. Used for parallel connection between panels while maintaining the voltage of your panel configuration. Compatible Solar Cable: 14/12/10 AWG (2.4/4.0/6.0mm2) Maximum Voltage: 1500V Maximum Current: 50A Insulation Material: PPO Contact Material: Silver plated copper Contact Resistance: Less than 0.5m ohm Operating Temperature: -40°C to 125°C (-40°F to 257°F) Protection Rating: IP67 Additional Model #'s 78-MC4-2TO1 78-MC42TO1 MC4-2TO1 MC42TO1 UPC: 840128902158