Overview(NOTE: Card not included. This product is for NVIDIA reference layouts only. It will not fit video cards that have been changed from the reference spec.)The Koolance VID-NX680 is a full coverage video block for water cooling NVIDIA GeForce GTX 680 cards in single and multi video card configurations. It utilizes a high-performance microfin (0.5mm) design made of solid copper with anti-corrosive nickel plating.Nozzle threading is standard G 1/4 BSP. For SLI configurations, Koolance connect nozzles are also available.Specifications Model VID-NX680 Compatibility (Please see list) Materials Copper, Nickel Plating,Acetal Tubing Size, ID (Any) Product DimensionsWxHxD 6.25" x 5.75" x 0.62" (15.9cm x 14.6cm x 1.6cm) Product Weight 1.5 pounds (680g) Components IncludedCooling block, thermal paste, mounting hardwareLiquid CoolantsKoolance"s product warranty does not cover the use of 3rd-party coolants, coolant additives, or corrosion. Koolance LIQ-702 or LIQ-705 coolants are strongly recommended to help avoid issues with mixed metals or biological growth. Additionally, do not use aluminum with bare (unplated) copper or bare (unplated) brass in the same system. Do not use nickel with silver in the same system.