A range of quality drive belts for use with cassette recorders. All belts have a square cross section of 1.2 mm<+>2+>. The easiest way to measure a belt is to lay it out in a circle and measure across the diameter. The following diameters are available: 19 mm, 30 mm, 35 mm, 46 mm, 66 mm, and 75.5 mm