Add some colour to your Torque fittings with these coloured rings. Offering a subtle hint of colour without the RGB lighting to give you that small unique look to your system. EK-Torque HDC 16 Colour Rings Pack - Black are the interchangeable aesthetic rings for EK\'s new minimalistic 16mm hard-tube compression fittings designed for use with 16mm OD solid tubing such as Acrylic and PETG. These aesthetic rings are made of anodized aluminum.The colored rings are available in many colors and are screwed onto the fitting before the compression locking ring.These accent rings are guaranteed to be compatible only with EK-Torque HDC 16 fittings.Note: Fittings for illustration purpose only and are not included