Neatly display your vacuum tubes in this quad stand. This stand prevents these top heavy and fragile tubes from falling over and allows you to keep matching tubes paired up. It is compatible with the following tube varieties: 12AU7, ECC82, 6DJ8, ECC88, 6922, E88CC, PCC88, E188CC, 6BZ7, CCA, and more. These are the tubes commonly used in Schiit Audio products such as the Valhalla and the Lyr 3D Printed from a durable composite that is UV and Heat-Resistant Installs to any flat surace Satin black finish