A synchronous belt quote moves for reasons that have nothing to do with how the belt looks. Mould and tooling amortisation, tooth profile, pitch, backing material and cord construction all sit in the price before volume is discussed, and the same belt quoted by three makers can differ by more than the freight. This guide sets out what each cost line actually is, where industrial grades part company with automotive grades, how MOQ and tooling charges behave on a repeat order, and which documents make a supplier's claim checkable rather than promotional.