Our Teflon heat-shrink tubing works well as a padding for most rod, tubing and even some flat stock used in mount making supports. It is clear in color and is not limited to just covering brass and metal, but will work just as well on wire, and pins. Shrinking Teflon tubing requires more heat than Polyolefin tubing, up to 650°F. Teflon tubing can shrink to approximately 1/4 of its original size. When deciding on the best size of tubing to fit a particular job it is always best to select the tubing size closest to the diameter needed. The measurement of heat-shrink tubing is that of its inside diameter. Teflon heat-shrink tubing works best if you don't try to shrink it more than half of its original size. The best way to shrink the tubing is to use a heat gun or hot air tool with a reducing tip for precise control. Never use an open flame to shrink the tubing, it will burn!