The Excel Enbeam OM1 Multimode Armoured CST Fibre Optic Cable Loose Tube 4 Core 62.5/125 Eca Blue is a high-quality fibre optic cable designed for applications requiring a high degree of mechanical protection. Here are some key features: Number of Cores : 4 Type of Tube : Loose Tube Number of Fibres Per Tube : 4 Fibre Type : Multi Mode 62.5/125 Category : OM1 Rodent Resistant : Yes These cables are constructed from standard single loose tube cables, which are then packed into a flexible but strong fiber glass water blocking strength member. These compact, lightweight cables are extremely rugged, provide rodent resistance, and are quick and easy to install. The cables are constructed around a silica gel filled tube(s) containing up to 24 colour coded 250m buffered fibres, which is covered with E-glass strength members.