Quick Facts - Ceramic sleeves are well-suited for single-mode applications. - Use the Standard Panels for traditional (low-density) applications. - Guaranteed for life! Further Details - Panels meet the industry-standard LGX footprint. - Panels snap into all standard fiber enclosures, cabinets, and patch panels, including all Black Box models. - Standard panels with bronze sleeves are also available, as well as high-density panels.