Introduction Fiber optic patch cord is made by exact equipment and multi-operation have been performed on it. Possess low insertion loss and return loss, has good repeatability and stability. It is wide application in optical fiber device and various optical fiber communication system. The connector of patch cord have FC, SC, ST, LC etc various type for choose, the core of patch cord have PC, UPC, APC etc for choose, and the multi-mode patch cord is 50 / 125, 62. 5 / 125, single mode patch cord is 9 / 125, diameter of fiber is 900um (single-mode) 2mm, 3mm (multi-mode) . Application 1. Optical fiber communication system, 2. Optical fiber data transmission 3. Optical fiber device 4. LAN and optical fiber sensor 5. Optical fiber CATV Feature: 1. Low insertion loss and return loss 2. Repeatability is good 3. Exchange is good 4. The temperature stability is good 5. The application is to optical fiber communication system, optical fiber data transmission, LAN and optical fiber sensor and optical fiber CATV