V-belt used in motor can be divided into light belt (type A) and heavy belt (type B). The belts used in general household appliances are all light belts (A), such as washing machines. And the heavy belt (B) is generally used for large mechanical transmission devices. Although your's belts are all 1 100 (indicating the circumference of belts), we usually talk about different thicknesses. Relatively speaking, the type A belt is thinner and the type B belt is thicker.