... 5D when G657 fiber is used.Options1, Fiber Type: G652, G655 or G657 single-mode fiber, A1a or A1b ... multimode cable, or other types of fiber;2, Jacket Material: Environmental low smoke zero ... contracted material;3, Jacket Color: (Including color of fiber) meets the requirements of relevant standards, or other ... contracted special request. 3G used 2-core Fiber Optic Far Transmission Cable IV (SJC004)