The RNF-100-3/4-BK-STK is a flexible polyolefin tubing designed for general-purpose use, providing reliable insulation and strain relief. It features a 2:1 shrink ratio and has a minimum expanded inside diameter of 19.1 mm which shrinks to a maximum of 9.5 mm after heating. This tubing operates over a temperature range of -55°C to 135°C and offers superior abrasion and solvent resistance compared to many similar products. It is widely used for insulating wire terminations, jacketing light-duty harnesses, and color-coding electrical connections in demanding environments.