TE Connectivity / Raychem Brand part NB18302001, also known as RNF-100-3-BK-STK, is a high-quality heat-shrink tubing designed for use in electrical and electronic applications. This tubing is made from cross-linked polyolefin material, ensuring excellent durability and resistance to harsh environments, such as heat, chemicals, and moisture.The RNF-100-3-BK-STK heat-shrink tubing offers easy installation and reliable protection for your wiring and cable assemblies. It features a 3:1 shrink ratio, meaning the tubing will shrink to one-third of its original size when exposed to heat, providing a snug fit around the wires.With its black color, this heat-shrink tubing provides a professional and aesthetically pleasing finish to your projects. It is supplied in convenient 4-foot lengths, making it suitable for various applications, ranging from automotive and aerospace to industrial and telecommunications.TE Connectivity / Raychem Brand part NB18302001 is a trusted choice for engineers and professionals seeking reliable and high-performance heat-shrink tubing. It offers outstanding electrical insulation properties, allowing for safe and efficient wire management and protection.