Color: Grey, Blue, Green Ratio i: 5:1,7.5:1,10:1,15:1,20:1,25:1,30:1,40:1,50:1,60:1, 80:1,100:1, extra cost for ratio 5:1 is 99 USD/PC  The output hole:  Φ61-Φ70       The maximum output end face stop is Φ162, the minimum Φ160, the limit Φ158, the output end face spacing is 184mm(M10*8) Input Flange: 180*180mm Gearing Arrangement: Worm Origin Mainland: China Certification: CE/RoHS/IAF/CNAS/ISO9001/ISO45001/ISO14001 Worm Gear Material: Tin Bronze Application Matched: with Servo/Stepper Motor Video outgoing-inspection: Provide Material of Housing: Aluminum Flange: Round / Square Approximate gross weight: 27 Kg/pc