MC4 30A Male Female M/F Wire PV Cable Connector Set for Solar Panels Join panels for more power . 1 pair Solar Panel MC4 T/ Y Branch Connectors Cable Splitter Couple Each PAIR is 6.00 (so two units ) MM-F =1 UNIT FF-M= SECOND UNIT There used to parallel panels I have a few sets so hurry or I'll return to wholesaler.