This is a SLI water cooling bridge for up to four Alphacool GPX Water Blocks.
They are however not just simple SLI bridges, they have an option to run LEDs through them so it can illuminate the Alphacool logo.
Installation is very simple using the included fittings. The special connectors have a G¼" thread on one side and a straight piece of pipe on the other side, which is simply plugged into the SLI bridge (double O-ring). This way it can still be installed if the coolers are already mounted.
Included in packaging:
1x Alphacool GPX SLI Connector - Quad