Color: Blue,Green ,Grey 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, extra cost for ratio 5:1 is 10 USD/PC Input size: 9/11mm  Output size: 14mm Input Flange: 56B5, 56B14, 63B5, 63B14 Gearing Arrangement: Worm Origin Mainland: China Certification: CE/RoHS/IAF/CNAS/ISO9001/ISO45001/ISO14001 Output Torque: 5N.m-21N.m Worm Gear Material: Tin Bronze Application Matched: with Servo/Stepper Motor Video outgoing-inspection: Provide Rated Input Power: 0.06-0.18 KW Material of Housing: Aluminum Flange: Round / Square Approximate gross weight: 2 Kg/pc