1 5M Aluminum Timing Belt Pulley. Tooth width: 31mm/1.22". Tooth number: 20. We will much appreciate it and try to improve our service. We will try our best to save your problem ASAP. A=35mm/1.37" C=You can choose D=35mm/1.37" E=31mm/1.22" G=2-M4x4.
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