Power y cables are 8 inch long and have 4 pin power connectors.
One Molex with Pins Connector
to Two Molex with Holes Connectors (Connects to drives) .
These are used to supply additional power
connectors to your exsisting power supply. Make sure
that you are not overloading your power supply.
Also be very carefull when putting these on to your system a flipped cable jammed together will cause system and device damage.
This particular cable has two of the larger connectors on the output side.
Please Note: this is the heavier gauge of this cable.