EK Lignum is the perfect symbiosis of the oldest natural building material and contemporary high-end cooling solutions. An unparalleled example of how your PC can reflect your lifestyle.EK-HTC Lignum 12 (Hard Tubing Compression) Fittings are 12mm hard-tube compression fittings designed for use with solid tubing such as Acrylic and PETG. It features all the perks of an EK hard tubing compressions fitting with the added bonus, a uniquely luxurious wooden cover.EK LignumThe founder and owner of EK Water Blocks, Edvard K�nig, has designed a new line of showstopping products the EK Lignum series. Mr. K�nig discovered his passion for woodworking at a very young age and began his career in a workshop. That knowledge and enthusiasm ultimately led him to start designing and manufacturing water blocks that we know today. It was only a matter of time when these two paths of his would collide and bring about something truly amazing.EK Lignum, signature edition of EK liquid cooling products is inspired by Mr. Edvard K�nigs love for woodwork and modern computer technologies. It is the perfect symbiosis of the oldest natural building material and contemporary high-end cooling solutions. An unparalleled example of how your PC can reflect your lifestyle. EK Lignum and its wooden opulence can bring a feeling of comfort and warmth to your home while keeping your PC cool and silent for its maximum possible performance.EK-HTC Lignum 12The locking ring prevents solid tube to be pulled out of the fitting by compressing the rubber gasket underneath the ring. Each fitting features a unique wood pattern which differs from every other fitting that is made.The barb and the ring are made of CNC machined brass and the seal is made quality rubber O-rings. The base fitting surface is smooth and has no adequate gripping surface, but the inside of the bard is socketed with a 9mm hex Allen key pattern. It\'s highly recommended to use an Allen Key 9mm (purchased separately) to prevent skin damage to the fingertips while installing the fitting. Please, be advised not to use excessive force when attaching fitting barbs using Allen Key 9mm in order to prevent damage to other liquid cooling products!These fittings have guaranteed compatible with all other EK Water Blocks liquid cooling products.Technical data:- Thread: G1/4\" BSP; 4.5mm male thread length- Supported tube: 12mm OD- Outer diameter of a fitting: 20mm- Installed height: 13mm- Compatible solid tubing: Acrylic, PETG, Copper, Brass, Stainless Steel