This listing is for an organizer pack of 25 Corning Fiber Connectors model OSNP-LCA-900-Z. These connectors are APC and 900UM and are ideal for use in networking cables and adapters, specifically optical fiber cables. APC is great systems that require low reflective loss such as DAS or Antenna systems. The brand is Corning, ensuring high-quality and reliable performance. This set of connectors is perfect for those looking to upgrade or expand their networking capabilities.