Features and Benefits:?Works with airless, hot-air, and nitrogen plastic welders.No need to identify the plastic.Works with airless, hot-air, and nitrogen plastic welders.?Square edge profile resists curling during repair process.Sticks really well to "problem plastics" like TPFiberFlex is Polyvance's "Universal" rod. It is not a true fusion weld, though. Instead, the FiberFlex is a hot-melt adhesive that is applied with an airless plastic welder. So, it is similar to a brazing process. It sticks great to polypropylene and TPO. This package contains 1 lb. (0.45 kg) of FiberFlex rod. Each rod is 12 inches (30 cm) long and is 3/8th inch (4.76 mm) wide and 1/16th inch (1.6 mm) thick. There are approximately 80 sticks in 1 lb. (0.45 kg)