AKAI GXC-709D cassette deck - simple belt replacement 

Thank you very much.

Thank you very much for update

Most recently, I already bought from Aliexpress, because you can buy a much cheaper and high-quality strap. Unfortunately, I don't remember the size. But if you take it apart, you can easily measure the required length.

Where did you buy the rubber wheels for idlers

@@bernardzertuche7376 I rarely buy idlers. They don't have the right size or they are too expensive. That's why I usually make it from an O-ring seal or a flat rubber seal. Buy a high-quality machine gasket and it can be customized.