1 3M Timing Pulley. Tooth width: 11mm/0.433". Tooth number: 12. We will much appreciate it and try to improve our service. We will try our best to save your problem ASAP. A=15mm/0.59" C=You can choose D=20mm/0.787" E=11mm/0.433" F=1.5mm/0.059" G=M4.
eBay