12 core, 16 core, 24 core, 32 core, 36 core, 48 core, 60 core, 64 core, 72 core, 96 core, 144 core optical fiber junction box, optical fiber junction box, optical fiber distribution box, optical distribution box, corridor box manufacturers sell directly to Jiangsu (Xuzhou, Suzhou, Nanjing, Suqian, Huai'an, Zhenjiang, Yangzhou