Features: Made of high-quality material, long service life and durability. Easy to install and convenient to use, diameter approx 12mm To replace the old, damaged or broken with this pressure cassette belt pulley. Fit for special rubber pressure belt wheel for video recorder/car radio/receiver/amplifier. Rubber give the tape a certain resistance, so that is in close contact with the tape to prevent the size from being different. Specifications: Material:Rubber Diameter:Approx 12mm/0.47in Quantity：5Pcs/Set Package Includes: 5PCS x Pressure Cassette Belt Pulley note: Due to the light and screen difference, the item color may be slightly different from the pictures. Please allow 0.5-2cm differences due to manual measurement