Each kit includes the sealed relay and connector, fuse holder, and all pins needed. These are 12v/40amp units. If you're wiring in an aftermarket fuel pump, radiator fan etc, this is an easy and effective solution to your OEM wiring. Note: Fuse is not included. The pins for each connector are pull to seat. Wire must pass through the connector and then be stripped/crimped andpulled back down to seat. If you crimp the pin on a wire prior to passing it through the connector, it will not fit. 14-16 gauge pins to be used with fuse holder, as well as positions 3 and 5 on the relay. 18-20 gauge pins to be used for positions 1 and2 on the relay.