The Bitspower Dual PCI Pass Thru Plate uses two expansion slots to allow tubing to pass through from the outside allowing for external mounting of the radiator. Maximum outer diameter for the tubing is 13/16" (20.6 mm).
Double G 1/4 socket fittings integrated into a rear computer slot bracket. Threaded nozzles are used for the inside and outside (2 pair, not included). Nickel-plated brass.