Watercool HeatKiller LGA1366/2011 Rev. 3 CPU Water Block (Made in Germany) Highest Quality- Made in Germany Fits Intel Sockets 1366 & 2011 G1/4" Threads (Fittings not included). *No refunds accepted for this item if the package has been opened. Defective items can be exchanged with a properly functioning item. Please verfiy compatibility before purchasing* Comatible with up to 1/2" OD Compression Fittings. Compression for larger than 1/2" Out Diameter tubing will require angled adapters.