EK-Quantum Torque Micro HDC 12 is a premium 12mm fitting made for solid tubing, such as acrylic, PETG, and brass. A much smaller footprint will allow tube placement in places where a regular fitting would be too large or inconvenient. It was named Micro due to an installed height of only 11.5mm, which is 23% shorter than standard Torque HDC 12 fittings. The outer diameter of the fitting is also significantly smaller than its bigger brother, with only 16mm across the fitting. The solid tube is gripped by the high-quality EPDM rubber gasket inside the Torque Micro compression ring. The surface of the fitting is smooth and has no adequate gripping surface, but the inside of the barb is socketed with a 9mm hex Allen key pattern. It's highly recommended to use an EK-Loop Multi Allen Key in order to prevent damage to other liquid cooling products. These fittings are guaranteed to be compatible with all other EK Water Blocks liquid cooling products. Technical data: - Material: Brass - Thread: G1/4" BSP; 4.5mm male thread length - Supported tube: 12mm OD - The outer diameter of a fitting: 16mm - Installed height: 11.5mm - Compatible solid tubing: Acrylic, PETG, Copper, Brass, Stainless Steel, Glass. Model: 3831109837405