Features: Made with quality rubber, it has strong wear resistance and is not easily deformed. Each package contains 100pcs of different lengths, 40-135mm fold length, which can meet the different needs of daily life. 4mm Width flat belt is suitable for most cassette tape drives. It is a great replacement for your broken belt and easy to install. Widely used in recorders, players, , DVD drives, DIY toy synchronous conveyors, and more.