EK-Quantum Torque Compression Ring 6-Pack HDC 12 - Green is a premium locking ring made for the EK-Quantum Torque HDC 12 series fittings. It is not a stand-alone product, requiring an existing Torque fitting's barb.

EK-Quantum Torque Compression Ring 6-Pack HDC 12 - Purple is a premium locking ring made for the EK-Quantum Torque HDC 12 series fittings. It is not a stand-alone product, requiring an existing Torque fitting's barb.

EK-Quantum Torque Compression Ring 6-Pack HDC 12 - Red is a premium locking ring made for the EK-Quantum Torque HDC 12 series fittings. It is not a stand-alone product, requiring an existing Torque fitting's barb.

EK-Quantum Torque Compression Ring 6-Pack HDC 12 - Blue is a premium locking ring made for the EK-Quantum Torque HDC 12 series fittings. It is not a stand-alone product, requiring an existing Torque fitting's barb.

EK-Quantum Torque Compression Ring 6-Pack HDC 12 - Satin Gold is a premium locking ring made for the EK-Quantum Torque HDC 12 series fittings. It is not a stand-alone product, requiring an existing Torque fitting's barb.

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.

EK-Quantum Torque Compression Ring 6-Pack HDC 12 - Nickel is a premium locking ring made for the EK-Quantum Torque HDC 12 series fittings. It is not a stand-alone product, requiring an existing Torque fitting's barb.

EK-Quantum Torque 6-Pack HDC 12 - Blue Special Edition is a fitting multipack containing six Special Edition blue EK-Quantum Torque HDC fittings. These are EK's premium 12mm hard-tube compression fittings designed for use with solid tubing such as Acrylic and PETG. They come with blue compression rings and nickel-plated aesthetic rings, which can be changed for another color if the user prefers to. Different color aesthetic rings are sold separately. The fitting barb comes in a satin titanium finish. They have a non-intrusive, yet striking look, and have NO added branding at all. To make sure they are undamaged in transport, they are packed in a box cushioned in black foam.

EK-Quantum Torque Compression Ring 6-Pack HDC 12 - Black is a premium locking ring made for the EK-Quantum Torque HDC 12 series fittings. It is not a stand-alone product, requiring an existing Torque fitting's barb.