For fiber installation, it's crucial to protect every single, delicate fiber. Specifically, the dual-head, shrink-fit design, coupled with stainless steel. Fiber optic heat shrink tubing: the perfect protector for both bare fiber and pigtail cables! choose between single or double needle options. free shipping on orders of 1000 pieces or more. The total length of the heat shrinkable tube is about 60mm. This specialized tubing is designed to protect and secure optical fibers, providing a durable and reliable layer that can. Fiber Sleeves are commonly used when two fibers are fusion spliced together.