Our adhesive lined translucent colored tubing is a semi-rigid, general purpose tubing that is lined with a layer of thermo-plastic adhesive which provides a barrier to corrosion and contaminants. The tubing is color coded to quickly identify wire sizes and is translucent to allow the installer to see the internal connections. They come in 6" lengths and red is for 20-18 guage wire. It has a shrink ratio of 3 to 1 and an operating temperature range of -67F to 230F.