1 5M Aluminum Timing Belt Pulley. Tooth number: 18. Tooth width: 21mm/0.826". We will much appreciate it and try to improve our service. We will try our best to save your problem ASAP. A=32mm/1.259" B=21mm/0.826" C=You can choose D=33mm/1.299" E=21mm/0.826" G=M5.
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