Special designed cross-linked Clear Heat Shrinkable tubing, with Clear fusion tubing liner, providing strength member and protection to fiber optical splices. Consist of 1/2 Ceramic rod, hot fusion tubing and cross-linked polyolefin. To rebuild the coating of fiber, providing mechanical strength at. 12F Single Ceramic Heat Shrink Protective Ribbon Fiber Splice Sleeve is designed forFlat fiber, normally it's 4 cores, 6 cores, 8 cores and 12 cores for choose. Suitable for 4 to 12 cores ribbon fibers, the transparent design. Ribbon fiber splice sleeves are applied in bar fiber-optic cables of the Ribbon (Flat) type. Excellent climatic and thermal properties make it ideal for use in closed as well as open spaces.