<b>Type: Worm-Gear Reducer</b><br> Speed Ratio Range: 7.5/10/15/20/25/30/40/50/60/80, please choose the correct ratio you need. <br> Input Bore Size : 11mm <br> Input Flange Model: NEMA23 <br> Output Bore Size: 14mm <br> Application: Matched with Servo/Stepper Motor <br> Goods Color: Argentate<br> Country of Origin: China(One year warranty) <br><br> <b>Tips：</b>If your Motor shaft is 8mm or 6.35mm, you can add a Adapter to search：B07W3PF8F5<br>