EK-Quantum Torque Compression Ring 6-Pack STC 13 - Black is a premium locking ring made for the EK-Quantum Torque STC 10/13 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 - 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.

EK-Quantum Torque STC 10/13 Color Rings Pack – Black (10pcs) are the interchangeable aesthetic rings for EK's new minimalistic 10/13mm soft-tube compression fittings designed for use with 10/13mm ID/OD soft tubing. These aesthetic rings are made of anodized aluminum.

EK-Quantum Torque Compression Ring 6-Pack HDC 14 - Black is a premium locking ring made for the EK-Quantum Torque HDC 14 series fittings. It is not a stand-alone product, requiring an existing Torque fitting's barb.

EK-Quantum Torque STC 10/16 Color Rings Pack – Black(10pcs) are the interchangeable aesthetic rings for EK's new minimalistic 10/16mm soft-tube compression fittings designed for use with 10/16mm ID/OD soft tubing. These aesthetic rings are made of anodized aluminum.

EK-Quantum Torque STC 12/16 Color Rings Pack – Black (10pcs) are the interchangeable aesthetic rings for EK's new minimalistic 12/16mm soft-tube compression fittings designed for use with 12/16mm ID/OD soft tubing. These aesthetic rings are made of anodized aluminum.

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 16 - Black is a premium locking ring made for the EK-Quantum Torque HDC 16 series fittings. It is not a stand-alone product, requiring an existing Torque fitting's barb.

EK-Quantum Torque Color Ring 10-Pack HDC 12 - Black are the interchangeable aesthetic accent rings for EK's new minimalistic 12mm hard-tube compression fittings designed for use with 12mm OD solid tubing such as Acrylic and PETG. They are made of anodized aluminum.