The optical fiber splice element is composed of: the outer diameter of the heat shrinkable tube (outer tube) is about 3. 2mm, and the length is about 55mm. Cutomize Length Support Fiber Optic Pigtail Joint Protection Sleeves 60mm Drop Cable Protective Tube Description: Drop Cable Protect Fiber Heat Shrink Sleeves is a special polyolefin thermal-shrinkable sleeve, also called EVA. The outer layer is made of high quality soft. The product is used for fusion splicing of communication products such as optical cable joint boxes, optical cable terminal boxes, optical cable transfer boxes, and optical cable junction boxes. 0 kV as well as mechanical and environmental protection. Using a gas tube that is almost the length of a rifle gas tube, making the gas take longer to reach the gas key. MDT-A Heat Shrink Tubes have a Halogen.