I am making up an order for Paul Cembuira.…….I also need a toothed belt for a Model 28 Reperf.The two pulleys are about 4 inches center to center.The only number I could find for that is - 161520But it did not say the length of it.I already have a belt that is much too small.I want to be sure I get the correct one.Thank you in advance for any help.I am fairly certain of all the other numbers I need.Tom N3CRK