[ High Quality ] DUPPCOS thread seal tapes are made of PTFE which has a good sealing capability and can resistant corrosion. Rated for temperatures ranging from -212° to 512°F. | [ Wide Application ] Plumbers thread tape are used in iron, brass, copper, aluminum, stainless steel, galvanized steel, polyethylene, polypropylene, PVC, CPVC, ABC, fiberglass and more. | [ Value Pack ] Each premium bag contains 6 rolls of plumbing tape, each roll measures 1/2inch wide and 520inches long. It's enough for you to use for a long time, you don't have to buy teflon tape again and again. | [ Great For DIY ] Wrap the tape around the threaded male end of the pipe or connector and screw it in. Keeps sealant tape dry and safe in a sturdy plastic case. | [ Long -Term Storage ] DUPPCOS Teflon tape are the best aging life of all plastics. Leftover sealant tape for plumber can be stored for many years. Don't worry about losing expiration.