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.•Sticks really well to "problem plastics" like TPO and polypropylene.•Rod diameter fits perfectly into theFiberFlex 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 is the bulk-sized package of FiberFlex rod and there is a 10 lb. (4.5 kg.) minimum order for bulk-sized packages. Each rod is 12 inches (30 cm) long and is 3/16th inch (4.76 mm) in diameter. There are approximately 100 rods in 1 pound (0.45 kg).