Get on Amazon.com : http://www.amazon.com/gp/product/B00JM1UB8O?tag=clothingattes-20<br /><br />CNC Engraving Machine Accessory 5M Timing Pulley Belt Set Kit Reducer Ratio 3:1<br /><br />Big Pulley60 Teeth12mm BoreDimensions100MM32mm <br />Small Pulley20 Teeth8mm BoreDimensions35MM30mm <br />Small Pulley With Top Screws For Nema23 2-phase Stepper Motor8mm Stepper Motor Shaft only <br />Belt Model5M-405 <br />Belt width 15MM
