The high quality ducting is extremely strong and durable, due to three layers of polyester reinforcement, and features a black interior. Each 25 ft section comes with 2 large zip ties. This product is made in the USA. The high quality ducting is extremely strong and durable, due to three layers of polyester reinforcement, and features a black interior. Each 25 ft section comes with 2 large zip ties. This product is made in the USA.